Paramount

Yes this will work

OPFA-3 for Celestron 2" SC-Thread #2458143 can be attached directly onto the 2" SC-thread on the back of all Celestron Schmidt-Cassegrains.
OPFA-2 for 2" eyepiece clamps #2458142 fit's into all 2" eyepiece clamps and is the probably the most versatile option.
OPFA-1 for 1 ¼" eyepiece clamps #2458141 fits into 1.25" eyepiece clamps.

If possible, we'd recommend OPFA-2 (easier handling, sturdier than a 1.25" eyepiece clamp) or OPFA-3 (the sturdiest version, holds even heavy cameras safe, but has to be screwed onto the telescope). OPFA-1 and OPFA-2 should only be used with good eyepiece clamps which have a sturdy clamping ring instead of only one simple clamping screw pressing onto the eyepiece/OPFA.

We do cut this thread according to the Celestron directives which are not to be published. We are authorized Celestron Distributor since 45 years and please be restassured that we know how to cut that 2" thread - as long as it will be fitted onto a Celestron-OTA.

Please check the dimensions before to avoid a possible collition. The inner Tube of the RT Model has a diameter of 63mm, please see:
https://www.baader-planetarium.com/en/downloads/dl/file/id/28/product/2858/bds_rt_dimensions_technical_drawing.pdf
Usually you mount the SC modell and focus with the original focus knob to a range that you can focus all your accessories furthermore with the Diamond Steeltrack SC. Please hold in mind that Meade sometimes uses sligtly different tolerances for the thread, We had some trouble with it in
the past. Which adapter you need for your telescope depends the thread you have. For the Steel Tracks you can find all dimensions under the Link
<Downloads>

We are very sorry in this case we cannot give a recommendation because our reducers are designed for SC telescopes. We never tried them with ACF telescopes. Please ask the manufacturer of your telescope which reducer works best.