I know that there are different/several roof lift systems employed by pop-up camper manufacturers. So, someone with an Outfitter, Hallmark, and other similar campers may be using electric lift systems, or, Heco lift systems. Heco systems (the system we have in our Outfitter pop-up) can be had with torsion assist. Also, the trend in the full-sized pop-up truck camper world appears to be going away from Heco (or, manual) lift systems, and full tilt into electric auto-lift systems; so it is only a matter of time before all the "old" manual lift systems die out, to a great extent, by attrition (perhaps this is the case today?).
So, I deduce that out of perhaps 8 or 9 pop-up truck camper manufacturers in the US, Four-wheel (and similar genre, and Alaskan campers) may have a unique lift system. Perhaps nominally, there may be only ~~1 in 30 pop-up owners on this forum who own a Four-wheel popup?
There are other forums "out there" where Four-wheel pop-up owners are more prevalent...
As a side, our "manual" Heco lift system has a built-in torsion assist, making lifting the roof very, very effortless. The general consensus at the manufacturer of our brand of camper is: if you want an air conditioner, or roof storage pods, or solar panels, and/or other accouterments on the roof, they will install torsion assist
by default. There couldn't be any worse post-sale "taste in your mouth" for any pop-up truck camper owner than to have bought a pop-up with roof accouterments that make the lifting process hellacious for "the little lady" :B So, I would hope that all pop-up manufacturers would INSIST that a new buyer buying a truck camper with an air conditioner or anything like roof-top solar absolutely have the extra mechanical "lift" capability.
Silver
2004 Chevy Silverado 2500HD 4x4 6.0L Ext/LB Tow Package 4L80E Michelin AT2s| Outfitter Caribou