The trigger on my Raytech IR broke and they do not sell a replacement. Send it in and for $40 they would sell me a new one. Bought this
one on Ebay for $9.50 and I'm pleased with it.
As for getting my spare on the roof, at home I use my BobCat but on the road I have drug one up the ladder using my 30amp cord as a rope. On that previous MH I put the unmounted spare around a roof vent in the middle of the roof without fastening it down. On this MH it's at the back where there is a lip plus I run a strap around it to the ladder.