Ron, some people "fill out" the spring by fitting coins in between each spring coil, which in effect lengthens the spring, and reduces the tension that you will have to apply. Coins are to be slightly bigger than the spring coil of course! Then when fitted pull out the coins.
When I fitted mine a couple of years ago, the cradle was not on the bike, and i was pulling the stand with spring, whilst my son was gently tapping in the bolts with spacers, when the holes line up. There were a couple of beads of sweat that day :wink:
There is a picture somewhere, possibly at OLD BRITTS, that actually shows this being done. I'll have a look and see if I can find it.