![]() Use the same tool to spread the wax along the undercutting. Heat this on a flame, then touch the wax to melt it and pick up a drop which should quickly be placed it the right position inside the hole. This can be done with a small metal point like the handle of a needleįile. Wax can be used to reduce the size of a hole. This circular movement is made easier withįinish the job by cleaning the hole with small rolls of progressively finer grained abrasive paper (240, 320, 400). To the fibres, when it will start splitting the wood instead of cutting it. The top and bottom areas of the hole must be cut separately, beginning on one side and working around to the other, stopping before the blade gets parallel However, recorder makers usually use a narrow tuning knife, but this technique needs learning.Ī 3 mm double-bevelled blade is perfect for this. Be careful to avoid the file "jumping" out and marking the instrument. Work at an angle in order to undercut the hole rather than cut it vertically. ![]() The safest tool for enlarging holes is a coarse round file.A fine file is inefficient on wood. To increase its diameter without moving it just enlarge it all around. ![]() To move a hole up or down the instrument, it is often sufficient to enlarge it on one side, and fill it in on the other side if necessary with a little beeswax. When retuning one particular note it is very important to watch the possible changes on all other notes depending on the same hole as shown in the table below.
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