I have 3 of them, I bought the other two bodies with fixed bases after I bought the 3 base and motor set from Aim Tools for £99. There is no diference between the Katsu and the Makita RT0700 other than cosmetic differences. As far as my research went a few ears ago it lead me to understand they are made on the same production line. I've had no problems with any of my bases at all, though the angle base is used rarely. I made a router table for one of the fixed bases as a permanent fit and have 1 in the plunge and 1 in a fixed base. I love them, a coouple of collegues have also bought them to replace their RT0700s as they have needed to be replaced. All the Makita spares and accs fit the Katsu including guide bushes. I would recommend ou get the full monty as it is the best value all round rather than getting the basic set and then wanting to other stuff later.
hth