Anyone notice the J and its clones do not have a test port for the secondary chamber?
With such thin walls there really is no meat to add a 27 tip 1/8" taper hole and tap either
Maybe a larger rivnut/ nutsert inside out might do the trick?
If not possible it rules out using the J with Peel Instruments lean bias logic processor.
And you know, after kitting a J I think I prefer the L anyway