Glad you got it mate, that looks awesome!
The best way of lowering the volume of these amps is to use the FX Loop Master on the back on the amp if it has it.
What I do on mine is to set the volume on the OD channel to about 9 or 10 o clock (turn your guitars volume down 1st or you'll deafen yourself as I found out on mine :lol: ), and then use the push switch on the back of the amp to enable the fx loop and then use the control as a master volume control for the amp.
You do lose a smidge of the grind of the amp, but alot less than using an attenuater. I've used my 100w Weber Mass with my QR and while it does considerably lower the volume for home use, it also affects the tone of the amp alot more than the FX Loop Master volume control does.