Yesterday I purchased a Wrench Force CO2 pump devise (see image) and Bontrager 16g cartridges. What are your thoughts on this type of inflation devise and do you recommend another type/style than the Wrench Force? What do you consider the positives and negatives? Can I over inflate a 27x1 1/4 road tire with this size cartridge. I want to purchase the same set up for my daughter except she will use 12g cartridges for her hybrid tires.