I'd stick with the bolt-on chuck, Ian. I presume that (like my smaller Warco-badged Weiss) there are studs sticking out of the chuck, with bolts which you put on them from the back of the spindle flange. If you have to fiddle bolts through from the back, loctite some studs into the chuck and use nuts.
You will soon get adept at fitting the nuts, but if your fingers are too chubby for the space available, bend a bit of rod into an Allen key shape, and use that to guide the nuts. In fact, if studs are fitted as standard, they may have hex sockets in the end, into which your applicator can be poked while you start the nut.
Bolt-on chucks can't come unscrewed if you run the spindle in reverse, or stop it suddenly when it's turning forwards.
Andy