My BMW issue tankbag has seen better days, the zipper problems were bad enough but now it's delaminating, so....

The "bagster" line looks good, I like the tank cover part and the (apparent) ease of removal of the bag. They don't specifically list a model for my 1991 K100RS, plain Ks and LTs but no RS, anybody using one? Does the bag inhibit steering lock? One of the nice things about the BMW bag is how narrow it is. $150 for the cover and $150 for the bag is steeper than I want to jump into without asking, TIA

Steve