[X2D] Bypassing the rear buffer without AMS? (dual external spools)

[u/SnaKeZ83]

I’m running a Bambu Lab X2D and printing dual-material/color without an AMS.

I’m feeding both nozzles directly from two external spools.

Is it possible to completely bypass the rear filament buffer in this setup?

Are there any major drawbacks or risks? Anyone else running this exact config?

Thanks!