AD&D 2E sheet - how to incorporate knockdown dice?

Is there a good kludge for Combat & Tactics knockdown dice in the AD&D 2E sheet using its native roller buttons and corresponding fields? I get the impression that the 2E sheet currently supported on here is more a base on which to build macros than intended to function in play by itself, and I appreciate all the hard work that’s gone into both the sheet & a lot of wonderful macros for it, but I’d rather save my players (used to slamming those buttons on Seth’s more comprehensive but sadly semi-broken-by-Roll20-updates sheet) any trouble caused by hitting the “simple” sheet’s roller instead of macro-built buttons. Surprisingly, even Seth’s PO-friendly sheet lacked a knockdown die field, but on Seth’s sheet I could just use brackets to close out the damage roll in the damage dice field, add the knockdown dice, then add the damage dice in a newly “opened” double-bracket, which naturally the sheet closed and completed itself. This method seems iffy on the (only supported) current 2E sheet - any bright ideas?

It's a bit janky, but, per Seth (you could say I know him...) You can use the fields in the Priest's Turning Table to make a simple die roller for any roll. I don't know what all would be involved in a knockdown roll per se, but if it's a macro of some sort you need, I can ask him, he probably has one still.