'I had to do the same to my RockGARD to get it to fit nice without a ton of room to flap around. And lots of repairs along the way, the tension rope that runs along the top had been a non-stop issue until I went to a coated steel cable and turnbuckles.
Much like the OP's Tux, it is pretty much shot after 7 years. I think if I spend some time with the
sewing machine over winter I can get a few more seasons out of it.
Not a bad product, it just hasn't suited my needs entirely. Decent protection if one is mainly highway with occasional gravel, but I am close to 50/50.
My next rock protection will be a Tux.'
How good a Tux is? I'd like to try it either.