I heard that BE is a good fundament for Callets Tongue Controlled Embouchure (TCE). Is this true?

I did masterclasses with Jerome Callet and Bahb Civiletti, and because I had done BE for more than a year, I didn't get lost completely. I knew, however little, some of the things that were expected of me. TCE purists claim that BE and TCE have nothing in common. BE teaches your lips how to make compression, in TCE the compression takes place between tongue and lips. Tongue position in TCE is different from BE. In both systems you tongue through the teeth, but in TCE your tongue tip stays anchored to your bottom lip, in BE you need your tongue tip to touch the top lip (or rather, in BE there is not a prescribed tongue position or use of the tongue, other then in the TOL exercises). Practicing TCE includes 'spitbuzzing' something that is not an issue in BE. So, really different systems. My own experience, though, is that BE makes the transition to TCE easier (if you would want to proceed in this manner). I don't use TCE, but my tongue tip rests against the bottom lip if I don't need it to tongue. I think this comes from my intensive practice of TCE a couple of months. If you really want to use TCE, I think you should stick to the real TCE routines. On the other hand, I think that BE is a great preparation for TCE (if you would want to look a bit further), and I know that TCE people disagree with me here. The reason I still think it is comes from my latest experiments. I feel that if I roll in the lips (especially the bottom lip) against my tongue, than the tongue takes over a part of the sound production. And when I say roll in, I really mean it the way it's described in BE. Despite the fact that the tongue controls the embouchure, I think the lips are an important factor and still do play an important role. The difference with BE is that in BE, RI is used as an exercise to teach the lips how to move in this direction an produce a sound this way, while in TCE RI is used to make the lips move in the direction of the forward tongue.

Practicing RI is important in both systems IMHO. If only to teach the lips how to do that.

NB. If you use RI to make lip compression, I think it is counterproductive when trying to learn TCE. Too much lip compression pushes away the tongue.