yep Robert....those are my pics. I actually swear by the oversized wood dowl mounts. Most people have good luck with the small little aluminum stand off's....but i haven't! I drilled my BME 58's mounting back plate out to accept 1/4"-20's and then ran them all the way through the firewall. I then used some 1" or so fender washers with some lock nuts. Also Robert....the wood i used is like an imported cherry wood from Japan. I found it at ACE Hardware and it's extremely strong! Waaaayyy more dense than even oak! I could not even scratch it with a finger nail. Oak is actually really pourus , and has a lot of "hollowed veins" which can crack after a while. Also....i cut the dowl 1/2' shorter than what i needed , since i have 1/4" high grade ply on the front and rear.

Just word to the wisw....anyone using the nylon inserted lock nut....you are NOT supposed to use thread lock on them. I learned this the hard way on racing bikes for 30 years. the locktite softens the nylonn and after a while , the bolt will just vibrate off. I think it actually make the nylon "brittle". As some of my bolts , the nylon was just flaking apart when i used locktite.

here is another picture for refference.