Fitting a macerator behind a CC toilet

[LesW]

Grudfos do a unit called Sololift WC3 that has a recessed front that suggests it might fit behind better but as I cannot get to speak to anyone at Grundfos other than an automated messaging system, I cannot confirm this.

So my question is, have any plumbers on the forum had issues fitting either Saniflow or Grundfos units behind close coupled toilets (without having to pack out the toilets from the wall). If so how did you resolve it and what model macerators did you use?

Thanks in anticipation

Les W