Do you have the clamp on the cowl or the intake box? Mine was clamped to the intake box when I got it, but Dale Gauger confirmed that was backwards. When I clamped the tube to the cowl, it slid easily on to the intake box. I remove the air filter bracket from the cowl and reach in with my hand to guide the tube. Adds maybe 5 minutes to the process.
Trimming the tube to length helps. If too long, it will compress like a bellows. Hang the lower cowl on the aircraft without the tube and measure the gap between the cowl and intake box. On mine it was less than 1/2".
I wouldn't stress too much about preserving the tube. It is a $20 part, and easy to come by. Most folks keep a couple on hand, and replace every year or two. Here is what mine looked like when I got the plane this summer.
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