If you've got a 16 odd mm hole just below and to the left of the bit the the spare wheel bolts to you could retro fit the auto opener easily.

Based on what I've seen with it and how it went together, I'd happily get more gear from them. Like you, I've read/heard a few others with some worrying stories, but at the end of the day, they answered their phone, answered my questions, returned emails promptly, the bar was ready within a couple of days from when they originally said, fit is pretty good, finish is very good, solid stub axels running car wheels bearings, so should be strong enough to hold a spare tyre. Overall quite rapped with it.