The 14" RT has got to be The Most frustrating tom in the mix! I even resorted to buying a Planet Waves Full-Function Tuner and Metronome. Even then It always ended up being pitched too high. I finally gave up on the size entirely and kept all the rack toms at or under the 9x13". They work great as a single 10x14" RT with 16 & 18" FTs, or as a 14x14" floor tom but I could never get them dialed in as rack tom in a prog run.
My 14" Slingo 2 header gives me more problems blending to the kit than the other toms... 8,10,13, & 18 FT.. can sound great as a free standing & useful tom... But difficult to include in the overall tonal blend of the kit... Still .. I love it..
Cheers
(And this is a great, thought provoking, thread IMO)..