Two other developers that I have used for tech pan are Ethol TEC and Diafine. TEC gives the 1-2 stop boast in speed, the grain is about the same as technidol. Unfortunately, the two solution, dry formulation does not seem to be available, only the 4 oz liquid. The two solution developer was extremely economical. I've not tried the liquid concentrate.(posted 8151 days ago)Diafine will give acceptable results if you develop in the A solution for the full 3-4 minutes and develop in the B solution for 45 sec to 1 minute. The contrast may be a bit high, requiring 1-1 1/2 grades for a condenser head and probably 2 on a diffusion light source. Grain is slightly larger than either TEC or Techidol, but is very economical. You also get the 1-2 stop speed increase.
See www.digitaltruth.com for the massive development chart.