Anyone carry CO2 cartridges (bombs) with them on rides instead of a compressor? After being let down by a faulty compressor and fuses being blown, I've decided to try the simpler bomb and adapter route. I've bought a few 25g and some 16g cartridges, but how many would I need to use to get to about 2 bar for instance on a rear tyre from flat? Also, what is the best adapter to buy?