Greetings all... Last night I finally got around to installing the new SD pups along with some shiny new 250K Bourns pots and rather large 47uf Sprague cap and Switchcraft barrel jack. I wired it up as SD recommended: 2V 1T. I just put an old pot in the 4th hole to fill it for now.
I only plugged it in for a few minutes just to test it out as I was running out of time but it all seems to be working at advertised. The signal output is a lot hotter than the original setup so primary goal achieved! It's also much more quiet - as I had to have the gain and volume cranked with the OEM pups it also boosted all the noise along with it. Handling noise seems to be about the same though - the SD's seem to be just as sensitive to the OEM pups when it comes to how you pluck the strings, and pull off the string after fretting etc. I think this is more my poor technique though which I have to work on. The Yammy has the tapewounds which helps mute quite a lot of that handling noise.
Tonight if I get some time I will fine tune the pup heights and give it a good playing - might even try my hand at recording something as a demo!
I've also just bought a new bridge as well off of a UK seller on fleaBay, I've gone with a generic brand 17mm spacing bridge. The original is 18mm and whilst I like the extra spacing, after looking at many pics of other IB-5's on this forum it seems the earlier kits came with a narrower bridge - they also have a lip on the side of the bridge plate which mine doesn't have. I think with 18mm spacing the strings are a little too close to the edge of the fret board now that I've played it quite a bit. It's a top loading bridge as well which is a nice bonus.