1. Test fit the tool on the bottom of the block with the four “ears” positioned on the sides of the block. If the tool will not fit onto the block, use coarse grit sandpaper to reduce the width of the block until the tool fits snuggly. If the tool is loose, the fit can be tightened by placing a piece of paper, folded as needed, between the left or right ears of the jig and the block.
2. Measure and mark the desired position of the new axle holes on one side of the block. Extend the mark from the bottom of the block to the top of the block using a square (or measure and mark near the bottom of the block and near the top of the block, and then join the line with a pencil and ruler). Holes for extended wheelbases are typically positioned 5/8” from the end of the block.
3. Adjust the Pro Body Jig to the desired wheel base; a 3/32 inch hex key is used for making adjustments. The wheel base adjustment can be verified by measuring between the index marks on the jig.
Position the Tool
4. Position the tool on the bottom of the block with the four ears on the sides of the block. Align the index marks on the jig with the lines corresponding to the axle hole positions on the block. Clamp the jig in place with two clamps, one on each of the drilling guides.
5. Hold the block firmly, position the drill bit in the hole, and slowly drill ¾” into the block.
6. Without releasing the clamps, drill the remaining holes.
7. If a raised hole is desired, drill only one of the front holes (either one) and proceed to step 8.
Drill a Raised Hole
8. Transfer the line on the side of the block to the bottom of the block.
9. Position the tool on the desired side of the block, and align the index mark on one of the drilling guides with the line on the bottom of the block. Make sure that the third hole on the guide is positioned near the bottom of the block.
10. Clamp the tool in place and drill the raised hole.
