Twin Reverb - reverb jacks as effects loop?

I've got a Silverface Twin that I get usable tones out of (clean), but the spring reverb isn't the sound I'm looking for.

I'd like to use the reverb jacks as a send and return to a digital reverb. I tried it out and was able to get good sounds. I have to back off the input level on the reverb unit, but it seems to work.

But I wonder if there is anything in the way the reverb circuit is set up on the Twin that makes this possibly damaging, either to the amp or the digital reverb. Any ideas?

Thanks, Rich. Your response helped me in my googling and I found this

looking for and a very easy project.
http://makeashorterlink.com/?M39C23B47

Which includes this:

One neat trick you can do that doesn't alter the amp at all is to use the reverb driver as the effects send signal, and return the effects output to the reverb return jacks. Set the effects for 100% wet, and dial in the blend with the reverb knob. Be sure to do two things first, though--

1) Make sure that the reverb driver transformer is properly terminated.
Build a small box with a pair of pass-through jacks. Set up the reverb send pass-through with an RCA jack (in) and a 1/4" jack (out) and an 8 ohm/10W resistor tied across the signal line (hot to ground) to properly terminate that reverb driver transformer. The return side can be a simple, 1/4" to RCA pass-through to prevent the need for wierd adapter cables of dubious quality from Radio Shack or the like....

2) If using a line-level (or pseudo line-level) effect unit, start with the output level knob fairly low, and run the amp's reverb knob about halfway up to avoid distortion. Remember, since the reverb tank's signal is /very/ small, the gain stage is set up to reflect that, and it may distort if the effect output is to high....

For the price of a project box, a resistor, and a few jacks, it's a heluva non-intrusive "mod".....

For those of you with Fender Blues Devilles and the like which have SS drivers for the reverb tanks (also all you SS amp guys), you can forget the requirement for loading the reverb driver output. It's only to save the tube-driven driver transformers, which /will short out/ if not properly terminated and dump the preamp B+ to ground through a dead short (no sound) or a high-resistance short (dirty sound at most volumes, weak output--check for lower-than-normal preamp B+). The SS drivers son't seem to have this problem, so enjoy....

Years ago I had a Super Six Reverb that had been cut down to a 2x12 combo, and I wanted to do what you're wanting to do.

I ended up with a box that had 1/4" in and out jacks, and cables that plugged into the reverb circuit. The name of that box's manufacturer escapes me, but perhaps this will ring a bell with some of the more knowledgeable posters here. It seems like it would be fairly easy to make, if that manufacturer's name proves elusive.

~Rich
See my gear at the link!