On my Spitfire with the TDR, one problem that seems common, is the little piece of Rubber Surgical Tubing aging, crumbling, then the Strainer doesn't work.
A little tricky dealing with the small C-Clip, but doable with patience.
BTW Tommy, thanks for again sharing the lovely pics of your TDR in WMP. Drool over that one, wanted such for a long long time to go in with the Barrett Set.
A few years ago one did pop upon the Bay, was willing to pay the handsome price, and the seller jerked me not once, but twice by backing out of the sale, and transferring back my paypal payment to me. Won't give a name, but he really "Goaded" me along on that one.
I have another mint TDR, that one in 5x14 COB, that one came from Steve Maxwell about 14 years ago at one of the shows. That one has yet to develop the Rubber Tubing issue, but now know what to do. It was Carl Wenk (Drcjw) who helped me get the Spitfire back up and running. Sent him a couple pairs of NOS Densiwood Sticks as a thanks.
Mark