You might have, or can inexpensively buy, a mechanical pencil which has the feeder button ... Perhaps one of those really large drafting lead holders could be repurposed as a solder dispenser ...

Shop now Get all the gear in one value-for-money purchase with the help of Nicpro’s 2mm clutch pencil set. Complete with an impressive six boxes of pre-sharpened lead refill, an eraser and a ...