How is that tank working out for you? I have had trouble when pulling harder turns with them. Anything special you do to them?
Allow me to add a comment, if I may. The "T-28" series was in response to George A's suggestion to Gil Henry, after the Flite Streak was kitted. None of the manufactured tanks that would fit had enough capacity for a high-revving 35, and George was using his own Chicken Hoppers he fabricated for his prototypes. He sent patterns and photos to Veco, but the result wasn't a Chicken Hopper at all -- it just "sorta" looked a little like one of those.
As long as the engine is revving up, the tanks work fine, but a slower flying model that has a "classic" breaking style engine attached will often begin to sputter and choke, almost die, all of the so-called "burp" symptomatic stuff, but in all manner of high altitude turns, not merely the high outside corners of hourglasses, squares and square eights. I've had that sort of response from Fox stunt 35s, Johnson "S" 33s, McCoy Lightning Bolt 40s, and OS Max-S 35s.
Engines that are operated in a "Wet Two" for stunting, like the K&Bs, weren't affected; Fox 35s set
NOT to break into a four stroke were far less likely to dislike the T-28s (and the Fox 25s -- three bolt variety -- would perform a perfectly lovely 4-2-4 waltz in spite of using a T-28).