Hello ppl , Reika love your mods.
Few things I think would work great with your mod.
Drill / Well Maker. Makes A infinite water. Have it set up to where, you face it down and when you uses its gui you can put shafts in it. Once it reaches Bedrock it turns into A Well and makes A slow infinite water. You can then Add/"upgrade it" with a pump. The more rads you put into it the faster it will make water. (lets get rid of the need for the Aqueous Accumulator)
Geothermal Steam generator. It will make steam from the core of the world. It would work like the Drill / Well however it would be made from all bedrock. So would take the bedrock braker before you could get it. It would Also take new pipes to pump the steam out. You would need pump water into the Drill from your well at A very high pressure. WIth this being Free steam .. would need too be late game. They would just get the steam, now they have use it with one of your turbines or something.
(this is going A little off scope of your mod. But you could have teirs of drills ..
1st teir (Ironhead/stone shaftes) gets water.
2nd Teir (diamond head/iron shafts) makes A oil / gas well / fracking well (these would only make so much .. would have to move)
3tier (bedrock everything) Free steam as long as you pump water from teir 1 well @ X rads..
Large Scale Dam turbine Multiblock structures. Not sure how you could set it up .. power would be based on how much goes around it and how many waterblocks are behind (pressure) [ I have no clue what I am talking about here Lo] this is not the same as your hydrokinetic Engine. (think HoverDAM)
Would Love A larger Wind Turbine ... mid / end game one. Like the Wind farm ones.
Light wall , Like the bridge but walls !
Rotary engine Lower tier fuel eng. They dont need the cooling that the others do and get better fuel performance however less power. Rotary engs tend too be lighter and dont get as hot.
And ... When you can ... new pipes, I hate your pipes, But i still love you. I like gregtechs pipes .. Steal his LOL.[DOUBLEPOST=1413767826,1413725423][/DOUBLEPOST]I swear ... when i was sleeping was dreaming of rotarycraft.
Livestock mill / grinder. Hook Cows or Horses up to A spinning shaft with leads. Would be A low tier multiblock Macarator /griendstone. Would need upkeep. Use stone slabs at first tier and iron base plates @ 2nd teir. Horses are A bit faster then cows. However to make sure it is not overpowerd and only use for early game. Make sure it only has one slot for ores and can not have any hoppers or pipes attached to it. This would be slow like the AE grindstone, however big, takes livestock, needs upkeep .. nice early game ore doubler.
Ok for the next thing. I think this would be epic and it fits with the scope of all your Items. However I think it would be alot of work. And maybe another addon.
Modular Mechs. Think Powersuit that uses parts from your mod. These would be 5x2 block suits. If you think about it your mod has all the parts, Engines,Gearboxes, transmission, Weapons, Drills, Lube, Coolants ect. Their would be 2 tiers Steel and bedrock, with 2x sets of workings. Gears or electronics (electriccraft).
Both tiers would have the same slots however tier 2 could have better tech.
If based on Gears you will need Lube reservoir
If based on Electriccraft you will need, coolant Water or LN2(upgrade)
Both mechs would give A speed jump boost and no fall dmg.
Upgrades,
Gearboxs / CVT. This would add how many types of Addons you can run.
Jetpacks it would take 4x of yours to make one mech addon.
Engine/ Batter types. better = faster. Gas Turbine = Best . However Charged coil will work and does not get A slot for fuel.
Shoulders you can Attach weapons too. And you have A ton of them.
Arms / hand / Tools. bedrock braker for a drill .. however would not brake bedrock .. would just be A large drill for mining. Chainsaw for getting wood.
Main use of lower teir mech would be travel and exploring. It would be faster and running but could not fly. However .. this is the main thing I would love. (so know how when you get A horse your are all happy cause your are way faster, But you cant go threw forest or shalow water. Well the Mechs can. They can walk in water 2x blocks deep and .. when they walk near trees (wood/ Leafs) they brake the blocks .. Delete them (can not use for getting wood).
so you can walk threw a forest would out trying too pathfind.
Anyhow , you mod has all the parts for Mechs, I would make Like A mech dock and you would have too park it their to change out the parts. (something like steves crarts but ..bigger)
And .. if you do that .. might as well helecopters