Darren
You may want to try looking in the technical discussion forums. I was gonna post the same question, but i did a search ang got some pretty good info. The thread below is on the first page of the tech forum. Hope this provides a llittle insight.
I've decided to go with the Terra Grapplers because i need to fit in my garrage.
http://www.elcovaforums.com/forums/s...ad.php?t=17574