OK - after some debate and good information about transducer installation I have ordered a 20 degree B-60.
This will work well in my application and will be easy to install (I hope).
FWIW - I see Furuno has 2 new units out- the FCV-585 (replacement for the 582L) AND the FCV-620 (replacement for the 600L). THAT FIGURES!!!!! And to top that off they have a $100 mail in rebate on the old units.
Now a few more pics -
I have decided that a good tool to use in the bottom of the transom, especially if the original wood is in good shape is a die grinder with a straight carbide tip router bit.
A lot of this original wood is so hard that the carbide tip blade sits and smokes (brand new tip) trying to cut it out. Whew!!! I also fab'd a homemade adze that works good in the softer spots. As mentioned many times before this has gotta be the worst part of the project.
Finally seeing some red. I feel like King Kong’s dentist.
Even thought there is good (hard/dry) wood up 2-3 inches from the bottom (as mentioned earlier) there are voids and soft spots at the very bottom of the transom.
This pic is looking straight down into the cut out transom -
AND - Santa (I mean UPS) made a delivery today. My RAKA shipment -
I might have to stay up late and mix up some test batches..