I would like the Meazzi IV data you have in Excel format.Wet path is most difficult to model. Email is sc_mitchelluk AT yahoo.co.uk . I can send you the wet response I have designed into the FV-1 DSP code - I have assumed a Bell Shape centred around 1kHz. I only know one wheel Meazzi owned by Phil Kelly in the UK. There are some Echomatic/Vox machines being renovated here in the UK . Regards,Steve