The point of this experiment is different ---(posted 8175 days ago)TMX seems to perform well in dilute developing agents and sulfite, yet rather base-rich solution. I like TMX in D-76H 1+3 except it takes long time to process, and I don't get full sharpness and highlight brilliance (you might disagree on this one). In this case, extra borax helps, especially if I proceed to dilute a bit further. THis is the point here.
So I don't think additional borax at full strength or 1+1 dilution helpful, but at 1+3 or 1+4 dilution it probably helps a bit, and at least save processing time. Indeed, original D-76 tend to produce a bit more fog with some films compared to many other developers, and it's probably unwise to increase borax for full strength use without otherwise good reasons.
At one point my TMX developer switched to carbonate/bicarbonate combination but increased borax and dilution worked as well.
Just an idea for dedicated D-76 users who try to get more out of TMX (and a yellow bag of chemical).
Darkroom experimenters: I am getting a feeling that ascorbate based developers tend not to require restrainer or antifoggant to produce comparable fog level. Is this just me or consistent with your experience??