I've processed quite a bit of old verichrome pan. The recommendation of 8 minutes at 18 celsius should give you good results. I tried see-saw development once and it was a mess, very difficult to control temperature. If you can find a 120 reel, you'd be better off. The Tri-X is likely to be heavily fogged, the Plus-X should be a little better. Tech-Pan needs a special developer. The contrast will be very high in HC-110.