[JLilly]

fromageGB, on 2017-August-13, 05:46, said:

Certainly. Playing natural continuations and not strong, you rebid 1NT over 1♥, which shows a 3-suiter short in hearts, so responder can bid 2-anything to play.

I'm figuring this would apply even on opener's 3=1={4-5} hands, since with responder holding 4=5 spades=hearts and a sub-invitational hand, the 4-3 fit in spades with a singleton in the short-trump hand is often the best partscore to play. But then responder has to show an invitational hand with Flannery distribution some other way -- a rebid of 2♥ makes sense, since responder is unlikely to prefer playing there opposite a singleton (or void).

[JLilly]

blackshoe, on 2017-August-13, 17:00, said:

If I'm not mistaken, T-Walsh will be allowed in the ACBL under the upcoming Yellow chart. Assuming it all gets approved.

Looks like it. Page 9-10:

Bidding agreements are allowed unless they are specifically disallowed.. . .
Disallowed Bidding Agreements
. . .
Responses and Later Calls
1. Psyching an Artificial response below 2NT to an opening bid or an overcall.
2. Psychic Controls.
Note: Almost all agreements are allowed beginning with Responder’s initial action.