Way back when, I had installed this bracket with screws and nut plates instead of riveting it on. I did this because It looked like it would be a real hassle to locate nut plate son the lower flange for adel clamps for the control cables later, especially since a big wire bundle runs right above there. Well, wiring is in, and I've been kicking this can down the road for a while now so I decided to deal with it today. I may regret this, but I'm going to try to cram 5 knobs on the stock F-746 aft control bracket, and had pilot drilled for this earlier. The big knobs are 2 7/16" on center, which is essentially Cessna spacing, an date ones on the ends (alt intake air and oil cooler air) are about 1 9/16" laterally outbd from the big knobs. They are also spaced up a little, so actual spacing is more like 1.75" This is obviously pretty tight, but I think I can get away with it because the cables I'm using for those secondary controls are basically heater control cables with small knobs that don't stick out nearly as far as the primary knobs. Anyway, I'm giving it a try and if it doesn't work I'll have to move them somewhere else. So, with that dimension fixed, I felt like I could probably space nut plates for Adel clamps on the same spacing on the fwd one. By removing 4 screws, I was able to drop the Xponder rack a few inches and slide the xponder out, which gave access to the allen screws holding the F-746 fwd. Removed this bracket, dimensioned and installed nut plates for future adel clamps and reinstalled. Ops checked xponder and it lights up green on the display, which is what it was doing before, so I guess we're good. The following 5 hours were spent re-designing the boost pump cover. Basically, I've got a couple of big wire bundles in that tunnel. Lots of people have difficulty with the radius of a big bundle rubbing where it makes the transition to the vertical at the firewall. I suspected this might be an issue for me too and I wasn't disappointed. You may recall that I'm going with an EFII boost pump and I kept it flat enough that I din't feel the need for the Van's doghouse. Instead, I made a cover that stuck up 2.5" above standard for the aft 1/2 of the tunnel. Well, long story short, I've decided that the simplest way to deal with this potential wire chafing issue is to just extend that tunnel cover all the way fwd. I disassembled the previous solution and remade the support structure, but ran the angles all the way fwd so I'd have something to attach the front part of the still to be fabricated cover to. This is a work in process, and I don't have any pictures yet. I've got a big piece of .040 sheet that I'm going to make a new cover out of. I'm using .040 because it will the stiff enough that somebody can put their feet on it without squashing it, or I can bolt a fire extinguisher, oxygen bottle, or maybe some cup holders on top of it. They just got a nice sheer/brake in the shop at work, so I'm going to finish up the supporting structure next time and also bend a new cover on the big brake so that I can get nice crisp bends.