I have a similar kit to the builders home kit.
Two elbows, I use the semi rigid tubing, and cut it as short as possible.
No problems, no leaks, and short dry times.
I take the thing apart every year and clean it out.
I too wanted to do a full rigid tubing solution, but my washer/dryer is in a closet in our kitchen, so space was a concern.
When I lived in NY I had a full basement with tons of room, I could have done rigid there no problem. There is just not enough space behind the driver if yours is in a closet.