Great news that!
Remember: Let the saw do the work, you're there to guide it and provide the back and forth action, NOT to lean hard down on it and go through the blades like there's no tomorrow. There are some schools of thought that suggest the blade could be fitted backwards with the cutting action working on the pull stroke, personally I get along better using a coping saw the conventional way. So long as the frame is tight, it makes no real difference
Looking forward to seeing the result of this addition to your arsenal.
Yeah, tis sad to hear of a tradesman unable to use his hands any longer, gotta be galling that. Least he didn't just bin 'em that would be the crying shame.