The Time Machine (all three sizes) are a reduced size Patternmaster. I never flew a Patternmaster so I can't compare any of the Time Machine "clones" to it, but I have built all three sizes of the Time Machine. I was quite satisfied with all of them.
From my memory, the 60 size is about 650 squares. The 50 is about 585-600, and the 40 about 530-540. Plans available from Tom Dixon. Tom has modified the fuselage look on the latest versions. I always did that since I never cared that much for the jet style look.