thanks ron. i kept all high res pic as well and they are ready to dl for you from my dropbox as soon as you wish.
yesterday i did an epoxy stress test. i used "uhu endfest 300" and jb weld.
jb weld claims to be able to stand higher temps than uhu. which is 150°c vs 250°c. uhu300 has to be heat treated up to 180°c just after the application to reach it's highest strenght. have found no info about that for jb weld. they just say that a bit heat (from a lamp's bulb) will speed up the drying process.
so first of all i sanded the both contact surfaces, cleaned with brake cleaner, mixed the epoxy, applied it and put everything in the oven at 200°c. both epoxies where super dry after 10min and ready to use. i took a little wire, attached it to one housing guide and the wrapped the other end around a heavy table's foot
i could lift the very heavy table and nothing broke. then i turned the heat up to 250°c and let the epoxy "bake" for another 30min. i repeated the test, and both epoxies passed the test.
with some force a pliers i could break the guides off. force was quite equal for both. big difference: most of the uhu was removed from the surface whereas the jb weld still sticked to the contact area but just broke in between. so i guess uhu is stronger, but jw weld sticks better. the outcome still was the same for both.
i used jb weld to epoxy all housing guides to the frame as it can stand more heat which is good for powder coating. when i went to bed at 1:30am it hit me like a stroke: the epoxy acts as an electrical insulator and so those parts can not be powder coated. so when i got up in the morning i drlled one 1mm hole through each guide into the frame. using some solid copper wire which was cut in length and hammered in the hole i now have a solid connection.
everything ready for powder coating. i expect to get i back in 7-10days. i will prepare exerything now so i can quickly assemble everything when i get the frame back
here you can see the housing guides on top.