Just to close that thread. Issue was only mine.
The main (NPC Nordac Radian 7.5) was perfect. Luff length was 37' 9 1/2" that is 2" 1/2 below max class length which is fine for me. (about 1" shorter than your 3Di Jim). 38" is exactly the max I get with my halyard topped out.
After spending more time on this, cleaning up a bit the mast groove, measuring with tack free. it at the ends boils down to this new main being really the first true class legal one I have on this boat.
My prior main was a bit shorter, shorter enough for me to deal with luff tension only with the halyard tension. Not something I can do anymore with this one.

all set. thanks fellows.

Hi Kellen,
The PM didn't seem to work. If you need a sink drop me a note at ravenracingdoug@gmail.com. I have both the galley sink and the one in the head.
Doug.

Brand new from Rig Rite. $15 plus shipping. email me for pictures brettlangolf@gmail.com Image to large to attach

Velocity Girl is for sale. She is hull 278.
Included:
Harstick cruising main with slugs
Gus Sails racing main Dacron 2015
Cruising pentex #1 2008
Racing #1 2016 Gus Sails
Cruising #2
Racing # 2 2016 Gus sails
2 cruising spins
Racing spin 2015 Gus Sails
New autohelm 2019
New prop 2015 and cutlass bearing
Transom was recorded in 2012

Asking 8500 dollars U.S.
Email canaanleonard@gmail.com for pics and more details.

FYI, the link changed again: https://www.waterlinesystems.com/new-products?category=J%2F30

Here's a photo that might match the factory setup for your boat. That is an Origo 4000. Notice the gimbal function takes place in a frame, not directly on the stove.