RE: Bowpress
The Bowmaster is capable of doing anything that you will need to do on your bow, including removing/replacing the string and cables. Depending on the length of your limbs you may have some trouble if you want to completely disassemble your bow (limbs off) but that is a rare condition for most archers.
I have done a bunch of tuneups, string twisting and such using a bowmaster and have never had any trouble. It is not super fast, however it is capable.
One good addition is the split limb adapters, even for non split limb bows. It pulls on the limbs from the limb tips allowing more normal deflection when pressing.