I get it now. I for some reason I thought you had the kit laying around for 10 years- my mistake.

When we built ours, I thought it was for getting a jump on spring and now the wife wants to try to grow all winter. There is talk of a heater.

Did you get your heat sink installed? I think that's a neat idea especially if your green house gets as warm as it does.

I came up with a "Row planter" made by cutting a 10' piece of flexible 4" drainpipe. There is no real advantage over pots except maybe you could hang them. The poor little lettuce is 3 weeks old- it's not growing but it's not dead yet either😁

There is a picture in "Rob's" gallery. I've forgotten how to post images.