There are lots of conversations on this.. sorry I do not remember the exact ones but a search will let you know... There are a few options.. Yours.... secong buy metal arms off teh web from a site in Germany, very reasonable.. and it comes with arms, screws and the ALREADY cut and threaded brass tube, the third option is what I am doing.... I already bought the arms... so I bought some stock brass tubing, cutting it, threading it, installing it. I also though re-inforced the inside of teh hull...... finally I, based on teh brillant idea of another tanker.... drilled out teh small hole on teh bottom of teh arms, threaded it, modified teh pin, which holds the road wheels, and there you have it... trouble free suspension, at least for teh road wheels.

KT