The tests were on a block from Gregtech that takes a diamond pick 10 seconds to mine. With a many head, ardite binding, and many rod someone else's test showed 3 seconds to mine it, with my many head, stone binding, and ardite rod it took a little over 4 seconds.
It was my test and it was with many head, ardite binding and ardite rod. With many rod it was about 6 seconds IIRC.
Edit: I recommend upgrading TConstruct to new development version. I've only tested hammer so far and it is awesome, but don't use it in your base (full ardite except many hammer head).
Edit2: Fragment from git commit as new modifiers aren't documented in book yet:
+ ItemStack piston = new ItemStack(Block.pistonBase);
+ tb.registerToolMod(new ModPiston(new ItemStack[] { piston }, 3, 1));
+ tb.registerToolMod(new ModPiston(new ItemStack[] { piston, piston }, 3, 2));
+
+ tb.registerToolMod(new ModInteger(new ItemStack[] { new ItemStack(Block.obsidian), new ItemStack(Item.enderPearl) }, 13, "Beheading", 1, "\u00a7d", "Beheading"));
+
+ ItemStack holySoil = new ItemStack(craftedSoil, 1, 4);
+ tb.registerToolMod(new ModSmite("Smite", new ItemStack[] { holySoil }, 14, 1));
+ tb.registerToolMod(new ModSmite("Smite", new ItemStack[] { holySoil, holySoil }, 14, 2));
+
+ ItemStack spidereyeball = new ItemStack(Item.fermentedSpiderEye);
+ tb.registerToolMod(new ModAntiSpider("Anti-Spider", new ItemStack[] { spidereyeball }, 15, 1));
+ tb.registerToolMod(new ModAntiSpider("Anti-Spider", new ItemStack[] { spidereyeball, spidereyeball }, 15, 2));
+
+ ItemStack obsidianPlate = new ItemStack(heavyPlate, 1, 6);
+ tb.registerToolMod(new ModReinforced( new ItemStack[] { obsidianPlate }, 16, 1));