i have a 85 phazer and i want to do a longtrack conversion. is a phazer mountain lite skid the same a regular phazer skid with extensions? just want to know if it would be worth it to find a real mountain lite skid or just buy extensions. also i've seen online people using extensions and moving 1 set of wheels to the rear where the extension meets the main rail. has anybody done this? any info on this, what works well, what doesn't work so well would be hugely appreciated.