I need to fret out some smallish shapes from a sheet of fibre glass based
printed circuit board, about 1.5 mm thick. Since this is a one off but
necessary exercise, I thought a cheapo Ferm scroll saw (in Screwfix cat.
£35.00) would do the job. Not perfect for the material, but feasible? Any
opinions?

Also, blades are sold with 10, 15 or 20 tpi. Which would be the most
appropriate for the job?

TIA

ZD