I've been using a RDS 001 Midplus that I purchased last year and really had not used until now. For the most part, have really enjoyed it, though it doesn't have much pop.The RDiS 100 seems to have the exact same specs, but I have heard that they play different. First question - In what ways do the RDS 001 MP and RDiS 100 MP play different? Also, I was looking at the Ultimum RD Ti 80, and I like the specs. 12.1 oz, 325ish SW, nice flex, 8 pts headlight. I've used frames such as Wilson Six-One series, Prince Diablo mid, which have more cumbersome specs. Yet, a lot of the comments regarding the RD Ti 80 insist that it's a frame for very advanced players, 5.0 and above (I'm a 4.5). Second question - Is this true? Is the RD Ti 80 really that advanced of a frame? The specs don't suggest that.