Yes i am doing it. I use a Bresser 152mm f5 (Flatfield achromat with modified Petzval design). Importantly it has a very strong Hexfocuser that can support an imaging train. Purchased from Teleskop-Express at a rediculously low price, unavailable from suppliers outside europe. BTW Teleskop-Express remove the 19% Euro VAT when they sell out side the EU, this offset pays for the shipping.
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No CA issues obviously as i am narrowband only with this scope. Surprisingly there turned out to be little focus difference, especially with Ha and Sii filters which are very close in the spectrum. Yes Oiii requires a focus check. I use a bahtinov mask to check focus when i switch filters. Importantly my Baader NB filters are parafocal and that helps. I tend to shoot Ha and Sii back to back on the same night and do Oiii another night, this cuts the need to refocus. You don't need a motor focuser if your prepared to do it manually, and the Bresser focuser easily supports my ASI1600MM-C and the QHY filter wheel - no sag, no tilt.
IMHO you would need to invest in proper narrowband filters. You can build a synthetic luminance layer with NB filters, particularly Ha and Oiii, but i find using Ha as luminance works pretty well.
I would not recommend trying LRGB imaging through any achro, but others might.