Reader Andy wanted a way to help his son transport his saxophone to school and submitted the following text and picture.
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My high-school aged son rides to school daily, and was having to transport his sax back and forth for band practice. I had bought him a rack (the Delta Post Porter Rack) for a bikepacking trip we did in fall, but the saxophone case was just too long and heavy to attach safely.
I cut a piece of 1 x 10 pine to length, to attach to the rack at the front with two screws, and also drilled twelve holes through to attach with zip ties to six other locations on the side tubes of the rack. I relieved the top of the board with a chisel between each pair of holes so that the zip ties are below flush. Then I added a second piece of wood to make a lip at the back that prevents the case from sliding off. The case is therefore wedged between the saddle and the lip.
A short piece of flat metal bar with holes attached to the bottom is for the rear strap. I put two tie-down straps on, then cut to length and melted the ends, so that there is no way they can get into the spokes.
The rack is very secure and convenient for him. He just takes the whole rack off the seat post when not needed, instead of cutting the zip ties. We had a very dry summer, but if we saw rain I'd put a few coats of paint or polyurethane on.
This is the general type of strap that I had laying around. Ratchet straps would work, but be overkill and more fiddly for him. I'm not sure I'd trust Bungees for this.