Struggling with install of fork legs on this Bridgestone 350 GTR. On this bike, the fork leg springs are on the outside of the upper tubes. To get the upper tubes through both parts of the triple tree the springs must be compressed to get the upper tube through the upper section of tree triple tree so the tube can be bolted and the lower pinch bolt tightened. At a loss as how to do this? Probably overlooking something obvious— but what?