Been away for a while but wanting to fit new cranks to my new school hack, so I bought some second hand DMR Chieftain Mk2's as they seemed to have a good reputation. Look super strong and easy to fit I thought. Anyways, the cranks arms are going to be a very tight fit onto the splines of the BB axle, which is fine, but my worry is that once I get them on I won't be able to get them off! Is there a special tool or something that I need when fitting/removing these things? I have tried a regular crank arm puller that I use on my... ahem... mtb, but it doesn't seem to be the same thread as the crank arms. So I don't really want to try fitting them until I know I can get them off again. Anyone know if I'm missing something here?!