PIE root shapes

I was reading through cat:Proto-Indo-European irregular-shape roots and I noticed *wreyḱ-, *wreyt-, *mlewH-, and *mreǵʰ- are considered irregular. According to w:Proto-Indo-European root#Sonority hierarchy, these should be considered legal, and LIV certainly has many such roots. Should we change over to a classification system that distinguishes R and M?

I'd prefer a system that distinguishes them only in these particular cases, ml, mr, wl, wr. We currently already do this with s: *sed- is just considered CeC, but *speḱ- is sCeC.

So, what would be your proposed change? mReC and wReC?

A capital M seems better, so we can group them all together.

Sounds good to me! Could I entreat you to make this change?

Done.

Thank you kindly!