Think that fuel tank is from a mugen mbx5t, I used to use on with a cen fun factor radio box in a mid-tanked savage. No longer though as the mugen tank is 125cc, bit to small in my opinion especially when it's being drained my an lrp zr.32 .
5-8 mins per tank was annoying, 250cc goes for 16 ish mins with an lrp.
Btw rc butcher go for the z.28r spec 3 it's the best lrp suited to the revo since it has about 4k revs over the .30 and .32.
Thanks