Wheel size expert
Recharge success.unfortunately no ... 27.2 doesn't share any common parts with the larger diameter posts ... you can share bits with other 27.2 posts (Eten, Cuxi) ... but not upwards in sizes.
I think I have an old 30.9 LEV in the workshop if you are budget constrained ... Its pretty ugly (anno is eatten away in large sections ... but it seems to be working alright with a new cart and bearings). I was going to use it on a frankenstein build I'm playing with when I'm really bored ... email email@example.com if you want pictures and a price.
at the top of its travel I'd aim for 190psi ... that translates to around 220- ish psi at the bottom of its travel ... max psi for a LEV is 250psi so would be similar for the DZ and SR carts ... which I think is at the top of its travel but not 100% certain sorry ... I'll ask one day.
presume you've seen the detailed thread in MTBR ???
I haven't tried the self build as we aren't allowed (Voids warranty) and we dont need to as we are supplied new carts ... but a couple of friends have tried it and all use the ball needle ... thinking out loud ... maybe some blu tack ... might pack in around the needle and hole and keep some of the back pressure from leaking out as you pump ???
Used a scuba tank and regulator adjusted to 200 psi with a ball needle.
Snappy return at 200psi, can hear the oil cavitating as it's going through the valve.