Since its an ancient tech, use decent amounts of naquadah (enriched and naquadria), some new fancy alloys (osmium-tungsten-naquadah alloy) and even neutronium (made in a mk3 fusion reactor by combining a stack of osmium with a stack of iridium and a stupidly high amount of energy over a looooong time). Think of anything mcguffium-like.
Neutronium is allready in. And used in my Ultimate Battery. But the new high tier stuff slowly feels like just using more of the old Stuff, not really new Tiers. So i would like to expand some of the high tech mechanics.
My current Plan about that is:
1. Finish porting. (Large Turbines, Player detector, missing magic gen functions, more fusion recipes. Something missing?)
2. Documentation on Wiki, maybe some balancing of the Stuff i added.
3. Back to GTExtras, finish Modular Armor, maybe first Oil Stuff i started.
4. Get a Stable GT5 version i can recommend for Modpacks. I hopefully reach that Point within a month.
5. Starting a "GT5 Experimental" where i make bigger changes to exsisting mechanics. Like: Porting over GTExtras stuff, more high tier tool materials, changes to the tool system, other ideas i have for GTExtras. I will stop working on GT5 once GT6 is playable, but maybe i will even make it to the point of implementing a research system on GT5.
Blood Asp, i have another request.
I'll be happy if you add switch covers on cables and valve covers on pipes. Because often I need to have main switch for my machines, but I didn't have that obviously device.
That allready exists in the original GT5. A shutter cover combined with machine controller does exactly this.