I had a Tweed Champ 5F1 clone in standard size cab ( 13" X 14 1/2" X 8 7/8") with an 8" speaker. I loved it for it's portability and tone. But I made the mistake of hooking it into a 12" speaker cab and was unable rest since. Finally, I bit the bullet and had someone build me a bigger cab. I went nuts a bit further and ordered a 12" Weber 12A125 for it.
I hooked up with a guy who occasionally sells tweed cabinets on ebay. I asked him if he customizes cabs and he said 'yes'. I told him how I wanted it to look like and he said give him about a month.
I got the cab the other day and couldn't wait to slap the chassis and speaker back in. I couldn't say much about the tone as the speaker is yet to be broken in. But what a difference it made as to how big and full it sounded. It measures 16" X 17" X 10". Still very light and portable.
I just love the way the Mercury looks, specially the porthole at the back panel where one tube peeks through, so I asked him to do that on my cab. Very cool.
Here's how big it is now compared to the 5E3 and Princeton Reverb size cabs.
Before, you can really tell the size difference.