Can older models be safely drawn to 29-30in?
Safely yes, comfortably, not so much.
I wouldn't recommend it the stacking and finger pinch would be horrible.
Mine stacks with pinch at 29.5"
Wouldn't recommend it
Mine starts stacking at 29-30. A real struggle after that. It's probably safe, but longer bows just work better for longer draws length's...IMO.
I have a 32" draw and I shoot a 55lb kmag just fine. I am, however, looking to get something that fits me better
My K-Mag stacked so bad that it is the reason I got out of traditional archery in 1975 and went to wheels. Fortunately I found longer bows later in life and was able to embrace traditional archery again.
I'm OK with mine at 28.5". Tried drawing back more just to see where it started to stack on me and I'd say that was around 29.5"