I think I posted a pic earlier in this thread of my tool rack behind my small Drummond lathe, at the tailstock end, away from the moving parts, which works just fine for me. No leaning over required on small lathe like this. HOWEVER, even I would draw the line at mounting the stop/start switch exactly behind the chuck as in this below pic from eBay. Puts your watchband and cuff of your long sleeve right on the chuck at every start and stop. This would have to be the absolute worst location possible, I reckon.