Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Time for a update
 Cylinder has been cooking in alum solution for about a week
50 grams Alum and 500 mls water
In a glass jar with a aquarium heater to keep at about 35 * C
Regularly use syringe to squirt solution into the offending holes
Drill bit has disintegrated. 7ba tap is just about done

Cheers
Dennis