Re: How fast can you do a set change? Home › Forums › Living with type one › How fast can you do a set change? › Re: How fast can you do a set change? 4 September, 2012 at 7:29 am #14329 AlisonKeymaster @aoife Why not! Or how long it takes to change the cartridge and needle on your pen (unless you use disposable pens in which case that takes away all the cartridge changing fun).