Congratulations, b rock, for still having all your brain cells intact after all this time.
I continue to sustain collateral damage in the pursuit of creativity, Bit. Acceptable losses for the short term. Now, in the "better late than never" category:
It's really annoying as I really like that patch but no matter what tempo it's at it never seems perfectly in sync and has always dragged a little.
It should be fairly straightforward to figure out what's bothering you here. There are 3 tempo-divided LFOs (labeled 1, 2, 3 on the right side of the LFO section). Each one "shares" the On-Off switch to the left. So, click on (LFO) 1 - Pitch, then switch it on & off. Do the same for LFO 2 - Cutoff 1 & LFO 3 - Reso 2. If these are problematic, you should be able to narrow it down by the process of elimination.
The Amp EG is a relative non-player in tempo arena for this preset. You'll want to focus on EG 1 (the Cutoff 2 filter sweep here). As I said above, the EGs aren't tempo-sync'ed. The default preset Attack time is 1806.8 ms. That's about 3/4 of a measure at 100 BPM. When raising tempo to 110 BPM, you'll want to adjust the filter Attack time, too. (Here's where a
BPM - Time - Frequencies calculator comes in handy.)
At 110 BPM, a 1/2 note will be about 1090.9 ms. A full measure will be close to 2182 ms., a 1/4 note at 545.45 ms., and so on. You won't get
exactly there with PSYN parameter adjustments, but you can get much closer. Left-click & hold on the Attack control (bringing up the ToolTip), then use the Up/Down arrow keys or mouse wheel for finer adjustments.
In Sonar, you'll want to enable "Give All Keystrokes to Plugin" for this process. The envelope generators initiate with a note onset, so it's also going to depend on the timing of your input (be that live keyboard or PRV entries).