I forgot to follow up on my post, too many projects on the go.
Sorry if I offended some of you with my choice of wording & font style in the subject heading. To address some of your responses:
- it was very solid ¾ inch MDF board (not particle board);
- distances are estimated but I am sticking with ...

- Solid IPEX schedule 40 ABS pipe. wrapped with fiberglass tape
- 2 inch x 36 inch barrel
- 3 inch x 32 inch pressure chamber, 2 to 1 volume ratio
- 3/4 modified valve (partition was removed within the cavity on the exit side, anti-siphon valve was fixed)
- at 80 PSI the spuds are knocked out at ...