"Through the frame slide" Do you mean rack and pinion? (Longed toothed rail under the slide) they are designed so the top hits the seal first as the power is at the bottom.. Both in and out the top will hit first at least on mine.
There is very little adjustment.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times