If you're thinking about putting a Janome 712T in an antique Singer treadle cabinet, there are a few things to keep in mind.
First, the Janome 712T doesn't come with its own cabinet or treadle base. So, you'll need to find a separate treadle base if you're planning to set it up in one.
Based on the manufacturer's description, the Janome 712T is designed to fit onto a treadle base. Some folks have suggested getting an old machine base, maybe from a Singer, and using it for your Janome 712T. This can be a cost-effective way to go since there are quite a few antique treadle bases out there that still work well.
Now, about fitting it into an antique Singer cabinet: from what we gathered, the Janome 712T can fit in many antique cabinets, including some Singer ones, but it might need a bit of tweaking. Some have mentioned that you might have to make a few adjustments, like resizing the cabinet's cutout or fiddling with the treadle belt tension to get everything just right.
The neat thing about the Janome 712T is that it's a solid, non-electric machine which is great for sewing without relying on electricity, or if you just love the classic sewing feel with some modern stitch options.
If you're going the DIY route with your cabinet, it might be worth checking out online resources or forums where other sewing fans share their tips and tricks—especially since the instruction manual doesn't really cover cabinet modifications.
All in all, the Janome 712T is a solid pick if you want a mix of old-school sewing with modern features, just be ready for a bit of DIY if you plan to use it with an antique cabinet.