Hi Vic
As I now work in the powered access industry, having worked for years in the lift truck industry, heres my 2p worth.
These covers are designed to be used with access equipment and I can forsee problems using them with fork trucks.
MEWPS are much slower in operation than trucks and they are mostly driven by hydraulic motors which means they don't have conventional braking systems.
I've spent the last few months dealing with machines operating in shopping malls, and office attriums which includes track driven specialist access equipment, and the only solution with this type of equipment is to use non marking tracks, this I feel is the only workable solution for using lift trucks in these type of environments, in order to keep the traction and braking characteristics unchanged.
ps
Still playing the old guitar are we???