10cm Graphite Marver Blocks from Blockhead Tools.
These blocks sit on your marver a not far from the furnace. Just a quick step sets up your bubble ready for another gather. Gather once, give it a quick blocking at the marver and gather again without having to sit down at the bench.
The Blockhead Tools Graphite Marver Block sits firmly on rubber feet to prevent sliding off the marver. It is secured to a Birch Ply base which will protect the block even if it does take a tumble.
Best of all, a Graphite Marver Block never burns out.