I did tap into the aluminum extrusion for all brackets. Small holes well placed.
Regarding the antenna location, I spoke with lots of racers who had every kind of antenna install you could imagine (on many types of cars). Common comment was if the antenna is on the roof you won't loose the signal. Any other location had some type of signal problem somewhere on the track.
i just installed the same system in my 944 yesterday.
i just used velcro for the traqmate and also for the chasecam since the system will be going from the 944 to the db-1 each event
i used really strong velco and the units wont be going anywhere, i had to pry them up with a screwdriver to bring them back in the house until the weekend.
the antenna certainly must be on the roof, or highest point of the car to function w/o interuption. i like the way you routed the antenna through the back hatch :up:, i will copy that on my 944, as i didnt think of going that route, and was going to just run the wire out the pax window taping down the wire so it didnt blow around.
my only concern with how you located things is with the display unit for the traqmate. can you even reach it while strapped in the drivers seat?
the other real issue with that location is that you need to look away from the road a fair amount to see the unit which is a big disctraction when at speed. I would have put some velcro on the bottom of the unit and put it on the dash, or put velcro, or the traqmate dashmount for the display somewhere near your gauge cluster, and put it in arms reach and where you are not looking far away from the road to see it.
i used H+L 400 from pegasusautoracing.com, but it was too strong, so i mixed one side with H+L 170.
i know for the traqmate to work that you need to mark the start/finish line once for each track you are on for the gps to locate that and start your traqmate sensors, and also turn on the chasecam in the process. can you reach the display unit where it is?
the system looks like a powerful tool, i look forward to mine this weekend in my scca race, and i really hope i can cram the things into the swift db-1.