I have one the same as TBM, had to buy it whilst the car was stored in the UK, I now use it only when the car will be left for a longer period to keep the dust off from other projects in the garage, i was surprised how big it was but have decided that is a good thing allowing air to circulate. No idea how waterproof it is as the car lives inside, the zips are a good idea enabling me to connect C-tek and check whats on board without removing the whole thing.
