An old wood chisel will usually give a cleaner job lifting the gripper strip glue if you get underneath it.
The Makita is a good tool, nice long lead fitted too. The multi-tools are very power hungry, so the mains version is the best option, unless you have other 18v tools to swap batteries with.
If you buy the quick change blades, with the open slot, you only need to back the screw out a couple of turns to change blades.