Do you have the dimensions of the plate you made? If so, are you willing to share them? Maybe a drawing somehow.
i agree, the whole touratech system is pricey. that's why i'm not considering their top box... i'll just get their quick-release system and slap it onto a pelican or something similar. plus, the empty box alone is on the heavy side. but still, even just the topcase rack and the rapid trap is a substantial investment in itself. anyway, i'm actually in it for the mod, just to keep busy when not riding on weekends
i hope you don't mind, not to hijack the thread or anything... i just thought i'd share something for others looking for a cheap luggage plate solution to consider.
when the bike was a few days old, i badly needed a rack to mount a decent tailbag. so before i found out the multistrada plate can fit the hyper, i designed my own using cardboard as a template then had a fabricator laser cut me the shape in 9mm plexiglass. also had him apply some black vinyl sticker to give it color. i then drilled holes for the mounting screws.
i since replaced it with the touratech aluminum plate, which i also mod'd to accept the givi tank lock system