I've found some squared paper

This is my first pass at the elegant profile of the rack.

I have more-or-less decided to integrate the three racks in the main unit rather than separate 2+1. This will mean restricting the depth of the garage and base unit but I think that is a price worth paying as it makes the most efficient use of the space available. In that case the the A154 Sequence Controller will not fit: so it goes, I don't have one yet and, in any case, sequencers are traditionally stored on the top shelf so if I get one, it can go there, alongside the Tiptop z8000.

I'm now waiting on the Lamond ends to check if they fit and then design more precisely.

I found the following in an old (2011) post on The Cupboard

• start by identifying my top 10 modules(/groups), get those in place and work from there. Initial thoughts must be
• Cwejman MX-4S
• Livewire AFG and Dual Cyclotron
• Metasonix R54
• a brace of 109 Signal processors with associated ADSRs
• the best three filters
• the above rhythm unit (the Pittsburgh Timetable in the pipeline, get the µstep)
  
• the best three output processors
• the best three random note generators
• the best VCOs (AFG and R54 above, must have the Plan B Model 15 VCO and Malekko anti-oscillator)
• two sequencers
• half a dozen [only half a dozen ?] Doepfer utility modules

It seems a reasonable starting point.