Sure Greg, with the various transmissions I can't always know if 'pushing' the modulator past neutral (atmospheric) will cause problems, so I always add the restricted bleed. It usually works well. You need an inline restriction, a Tee-fitting and a one-way valve.

Coming from the engine side, the line is cut and the restrictor pressed in the tube. The restriction seems to work well for most trannys at .020 to .030 inch (.5-.75mm) and a MIG welder tip is an easy cheap source for the restrictor. I use .023 tips and turn them on the lathe or just chuck one in a drill and file a section to fit in the tubing snugly, hack it off, and press it in deep enough for the Tee to go in after it.

Next, add the Tee fitting and the rest of the tubing to the modulator. Off the Tee put your one-way valve so it will blow to free air but not suck air into the line. No filter needed. I choose valves that are easy to unseat as some are surprisingly difficult to open - although that fact is likely not as critical in this situation as it is when used with other devices - but I still like easy. A big valve for flow is not necessary as the restrictor minimizes that issue, however a simple mouth-blow test will tell you if it at least flows more than the restrictor.

With this setup, you get normal vacuum control all the way to boost level, and stable zero vacuum/pressure thereafter with fast recovery to vacuum. Keeping the parts close to the modulator and not using a huge 1-way will ensure a fast response and no difference to a stock setup. When driving normally (off-boost) it shifts normally. An interesting note is that this system also has worked well on electronic transmissions that use a manifold pressure (MAP) sensor and I have used it on one of my own ETC trannys with excellent results.

Hope that helps,
David