On the tank relocation...I did it with a dremel tool. Flex shaft would have made it easier but I didn't have one. It's a very worth while modification.

Engine mounts were relocated keeping the engine on exact same thrust line (precise calculations were necessary here)

I purchased the main gear from TNTLANDINGGEAR.COM
Just get on their website and tell them the plane you have. They will custom make the gear for you. I didn't even have to furnish dimensions.

The wheel pants are replacement pants for Sig's Rascal 40 ARF purchased from Sig. They're nice because they come painted in either red & white or blue & white

I bought smooth rubber wheels that fit the pants (maybe 1/8 or 1/4 inch bigger than original)

Tower Hobbies supplied the exhaust extension (part #LXCB00)

Tail wheel set up was Tower also (part #LXRWW7)

I used a Slimline fueler which works well (also from Tower)

Let me know if you need more info