... If you know this beforehand - and run everything of batteries or their own supplies - then fine. However - I didn't know this - and on the Pedaltrain site it says
'CAN I MOUNT A POWER SUPPLY UNDERNEATH MY PEDALTRAIN?
Yes. All new Pedaltrain models (including PT-MINI and PT-NANO) will accommodate Volto, our Lithium Ion rechargeable power supply.
Also, all new Pedaltrain models (excluding PT-MINI and PT-NANO) will accommodate Powertrain 1250 without the need for any extra mounting brackets.
Lastly, all new Pedaltrain models (excluding PT-MINI and PT-NANO) will accommodate most any power supply available underneath with little or no modifications necessary. We sell brackets to mount common models."
So I bought with the confidence that I could use my voodoolabs.. but no. It doesn't even fit my tiny Dunlop brick underneath.
Otherwise - it's made very well - up to usual Pedaltrain standards and is a great size for me... (unless I have to take up a lot of the real-estate with power supply... or build longer legs on it so that I can fit a supply underneath).
I've emailed Pedaltrain to ask them to update their site or make it clearer - no reply as yet..