My Mosley's a 10/15/20 tribander ... my fan dipole is 6/10/15/20/40/75/160. (15 tunes on the 40 wire.) I've been thinking about adding 12 and 17 to it since tuning for both on my fan dipole is sub-optimal. As it is, I typically "forget" 15 meters exists so I'm lucky to remember to check that band.
Have the wire and parts to add 12 and 17 -- if the weather breaks this weekend and it stops raining here long enough I may be able to do it. Thanks for the tip on 12 and 17.