Thanks for the thoughts. I emailed PD a few weeks back, but didn't get a reply beyond ackowledging that it was a design question.
I barely get 200 jumps a year so I'm not going to pretend I'm heading for a Velo (I'd love to try one just to know what it feels like, though) or even pushing beyond WL1.8
I like to get out at 5-8k and stall and dive the hell out of it. the coolest thing about the 135 was that hitting the brakes and then leaping on the front risers (slightly offset to initiate a turning dive) put me back into freefall for a couple of seconds. then, as the riser pressure blistered my hands, I could keep the turn going through the harness. my Neptune would go back into freefall and then show dive speeds of 100+fps
to land, I go for 90 degree (from 350 feet) or 270 (from 500) with 5 secs before levelling off with rears or brakes. ie reasonably conservative, but, according to PD, hideously overloaded. when I tried the Stiletto 150, I brought the 90 turn down to 290 feet because it recovers so fast, but I didn't like the oversteer of the Stiletto compared to Sabre 2