Glad you got it in, but No straps needed at all.
I have been doing it this way for years with air tools.
I take and put the two front mounting bolts in, then I loosen
The jam nuts on the track adjuster all the way to the head of
the adjustment bolt.
Now I take a air ratchet and equally tightened each adjustment bolt.
As the track gets tighter it pulls the upper idler wheels down
and forward and pushes them right into place