VT1 and VT7 user here. They've been with me for several years.
Back in 2015 I contacted Doug to ask him some questions about the VT15 after I'd started hunting around the used market for one.
One thing I was concerned with was if it had a cooling fan like the VT7. Reason is that I wanted a unit with a mic pre
and compressor for VO work but no EQ, and needed to situate the unit close to the work station & mic so silence was a big factor.
After answering my questions about the VT15, and discussing cooling fan requirements on his units that have them, Doug graciously offered to build me a custom unit with a VT1 mic pre and a single channel VT7 compressor without a cooling fan. So I took him up on the offer and he went to work designing it. He drafted the schematic and after he was confident in the design and we discussed control feature options he built what he called the VT17. (VT
1 & VT
7 = VT17).
Being a prototype, he used a VT7 face plate and rearranged & relabeled the control knobs and switches. The build was beyond my expectations and has been my signal chain for VO since the day it arrived. I guess one day I'll reach a point where it's time to send it to a new home but it's gonna be pricey!