Hi CBD1000
thanks for reaching out!!
top row - kind of ok - too many sound sources in my opinion = BUT it is a percussion rack! so not surprising really
bottom row - it's all sequencer and mixer
overall - not that balanced - I would want more modulation and utilities (but then I almost always do) and from the looks of it you realise this yourself, already!
so 2 possible solutions:
add another row for modulation and utilities
remove stuff and replace with smaller modules
so more space in the top row - dump the tangle quartet and the ledRover - replace with veils - 20dB+ of gain introduces quite a lot of grit! and you get 4 channels of it and they are vcas!!
I'm not going to comment on the drum modules - voices/vcos are a very personal choice - but they are big and there are other modules that will do similar things in less space (but they may not be as ergonomic!!)
as for the sequencer and the mixer:
work out what functions you absolutely must have for drum programming - could they be met with the pams and clever use of logic modules and other utilities? do you need recall (Pams even has that!!) - have you also looked at other similar modules - tiptop and robaux swt16+ spring to mind! robaux may be diy only, idk - but if you want it and you can't solder and don't want to learn there are many, many builders out there who will make it for you
regarding the wmd pm - I very very nearly bought one of these... but after months of thinking about it ended up getting a Tesseract Modular Tex-Mix system because
it has most of the functionality that I wanted
what functionality it doesn't have is easily patchable (auto-panning and cv over aux) with other modules*
it's very inexpensive - I diy'ed mine - but they are not much more built (the diy is really the panel furniture and headers - smd pre-soldered)
expandable - want more channels add another module with either 4 mono or 4 stereo channels - want direct outs? they are post-fader! want mutes - they are built in as is a cue mix
*this is the key note here - it's modular - learn how to patch basic functions (utilities) to do other things - you may not need 2 channels of auto-panning more than 20% of the time but you will probably need more vcas, modulation, inverters, etc etc the rest of the time - if you have a comparator and a vca you have a compressor (if you know how to patch it) etc etc etc
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities