In a couple of partnerships I play the direct raise as 9-11 with 3-card support. Some 8-counts are upgraded and a few 12-counts downgraded. We also raise with some 4333 hands with 4-card support that we evaluate as not fitting for a Bergen raise. However, we don't use a forcing 1NT. Not being able to play in 1NT is too costly when playing MP, IMO. And we prefer to have a single system. What we do is to have a 2-way 2/1 response, showing either a natural 2/1 or a weak (3-8) raise. In one partnership this is 1♠-2♥/1♥-2♦ (2 in the suit directly below the opening suit), in one partnership this is 1M-2♦. This isn't very hard to implement.