Bah, and while we were all talking about this he changed how the stats on hammers come about -_- Hammer dur and speed is a function of both the plates and the head and is then multiplied by the handle. What this means is a hammer with a cobalt head and two cobalt plates will have a speed of 11, but a hammer with a cobalt head and two slime plates will have a speed of 4.66. As another example, a hammer made of full manyullyn will have 27000 dur (the numbers were nerfed a bit) and a mining speed of 9, while a tool with a manyullyn head and handle and two cobalt plates will have a dur of 20922 and a speed of 10.33.
What this means is that for the hammer, if you want extra mods from paper you're looking at only the handle, and then the example tool above with many and cobalt will have a dur of only 2519, which means that extra mod will be going to electric, as just replacing one of the cobalt heads with paper lowers the speed by 3.
For anyone wondering about the numbers, a hammer with a cobalt plate, many head and tool rod, and a paper plate with 50 redstone will only have a speed of 10, so a cobalt plate is much better than paper in terms of adding speed to a hammer.
Edit: Yea, the book is off about redstone for hammers. It says .08 speed per redstone, but it's only .05 on the hammer.
Another Edit: Just tried out a hammer with electric on it and...hopefully mDiyo will add a stronger version that requires something like an advanced circuit and a lapotronic battery or w/e the tier 3 one is since the 10k eu from the current electric only lasts about 20 uses on the hammer, give or take a few due to reinforced.