That's pretty much what I was thinking when I got my HF2 Jason. One of the discussions that has gone on in here though has been about modding the 325. Some of the same stuff like venting the drivers but the big 325 mod seems to be removing some plastic ring inside the cup. That one seems to be a big hit for those that modded there 325. Personally I cant see paying the extra for the aluminum like you did for the 325 then discarding it for wood. One of the things I think Bill is working on is a wood inner that would house the driver and line the aluminum cup like the HF2. We now know the HF2's cup is lined with wood now that one of the denizens this thread, Schwallman had the audacity to crack open his HF2's. So that may be a way for you to go with your 325. Of course you can sell them to once you hear how good a modded SR60 sounds.
As far as what kind of shape, that's up to you. I cheated the first go round and got a set of cocobolo's from Bill. I just got a chunk of African Blackwood though and am going for a GS1000 look. It's going to be a 2 piece construction replicating the plastic driver housings with African Mahogany.
mc, I possibly should have stayed with an SR60 given how much I know the sound improved on my 60's, but I've got a 225 en route. I'm not sure if the 225 and 60 use different drivers but plastic to plastic I know the 225 bested the 60. So I'm thinking with wood perhaps the 225 stays ahead of the 60 on the SQ curve. What about that gamma thing for a DAC or a used uDAC?
Here is what I used to make some grills with:
It's a little mini pen and pencil holder. Same principle as the letter tray...like $3 or $4 at Walmart. Just find something round in your garage or laying around the house to mold it around after you've cut out your circle's. I used a spray can lid. It cuts really easy, scissors do the trick. Now I need a pewter one for my Blackwood cups.