sorted

That's the indicators fitted in their new position, the base-plate for the saddle-bags sized and a hole made in it for the seat mounting screw to go through. The saddle-bags are on, seem to be secure and so I'm ready to go try it all out.

I tried several different ways of mounting the saddle-bags. I had them slung a bit lower and a bit further back on the fender. Nothing seemed to go altogether right. Either they were too loose, too high, too low or pressed over the end of the indicators. Finally, I had a brainwave and tried them on the opposite sides.
It worked. I admit, they may look a little out of place with the sloped edge of the bags to the front but they are a lot more secure and fit in better with the indicators. This way there is slightly less room at the pillion foot-pegs but as I won't often be carrying a passenger and luggage, that shouldn't be too much of a problem.

(Although they fitted OK, when I took the bike out of the garage and looked it over, the bags just didn't look right. They made the back of the bike look high. I know that it's not all about looks (or I wouldn't have bags on a night train in the first place!) but it just wasn't right.
So, I messed around a bit more and got the bags on the side they were designed for. You can make your own mind up.)

I haven't tried it out with the rack on instead of the pillion seat but as the seat holds the base-plate in place, that may not work. But, as the rack goes with the bare look I shouldn't think I'd be needing that combination.
I'll get a photo up later.
Now all I need is a day or two of dry weather and I can get packed up and head off camping. (Biking in the rain is one thing, camping is another!)