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All you need to substitutethe focuser retrofit (o-ring, tension<br />
screw and retaining knob); 3 allen keys: 2.5mm, 2mm, 1.5mm.<br />
We recommend using high-quality chrome vanadium steel allen<br />
keys if possible, but we provide a standard set for your own<br />
convenience.<br />
Make sure the drawtube is retracted and locked before starting<br />
the upgrade. Make sure also the rotation thumbscrew is locked<br />
too for ease of operation.<br />
Loosen the small silver tension screw but do not take it out yet.<br />
P01<br />
P02