Moin… I want to preserve the frame from the inside and parts of the body with Mike Sander’s cavities grease, but I don’t want to spend any sums for the required “special device”. Does anyone have experience with the “construction” of a cavity probe,so that I get into the frame optimally? Compressor etc. available. The appropriate cavity nozzle costs 22 €,that is still to be ache,but is it compatible with the commercial cheap spray guns ? or someone not at all for Mike Sanders? Thank you and greeting Sebastian