Already fitted RS type seals in both wheels, so that's staying as is. Arm is a weight thing i agree, but it serves a purpose as a 1st build & RWYB.
As said, when funds allow, then i'll get into the engine, look at moving battery down & back, having tank cut, decide on arm, etc etc.
Just looking at simple basics, this is new territory here so don't be so rash @K.H.I