Ian, I think those controllers with the "gear" option need a pulse signal from the transmisison. (Typical no cable instruments using a speed sensor on the trans that generates a pulse type signal the "speedo" reads as forward velocity.)
Where the MK3 is mechanical based, You'll need to add a pulse type signal generator from another car to use the gear selection from what I can tell.
I've been through a few controllers.
Manual one built on a pressure regulator and bleed valve. Worked Ok, but was not adjustable on the fly.
Blitz DSBC that I used with great suiccess for years. Has pressure reading, warnings, and a few settings etc. Can't remember all the details anymore, but it worked fine.
Greddy Profec E-01. Spent the most money on this, has a great screen, works with my Eman and everything, but does not control boost any better than the Blitz when you come down to it. Also my last actuator rod tension setting is netting me over 20psi cold, and about 18 warm, so the EBC does not do much when your trying to run boost levels near those figures. I need to back off the tension on the actuator to about 12psi, and then tune again, but right now I'm about to sell the bolt on T4 setup, the WHOLE piggyback Eman/E01 deal and go with a Maft Pro and T70 eBay turbo.
I can feel for you on the lost traction deal however. At full bore, foot to the floor, there is NO traction in the lower gears when the boost hits. (I'm finding I'm still fuel cutting even with the Hz output clamped to 1450 by the eman? Weird.) It generally cuts when the boost spikes up to above 25psi however, so it's a good thing I'm running Toulene in my fuel...
No detonation problems.
I'm going to use the Maft Pro to control the boost, fuel tuning and replace the AFM with speed density so no more AFM issues and placement for me. What I want most is to hook it up to my PLX and let the autotune do it's job. Fuel based on AF ratio is very cool indeed.
I'm still going to route the BOV's back into the intake to keep it quiet and blow over the turbo to help with spool, also not going FFIM at this time. No more money is going into this motor, but I might buy larger injectors if the 550's I have now become a problem. (Thinking more like something near 700cc and let the Maft Pro tune after setting the base fuel pressure so idle is right, assuming that still works with the maftpro in place...)