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Here's a way to modify a CG v1 hand (or a LM hand) to accept a CG v2 wrist.

Please note that this is a destructive procedure, if something goes wrong, the v1 hand can not be restored and is likely to be unusable.


Tools and materials needed:
  • v1 hand to be converted
  • spare v2 hand for donating the v2 wrist
  • Sharp X-Acto or similar hobby knife
  • Pin vise
  • Motor tool
  • 2.5mm (0.1in) drill bit
  • small (2.3mm/0.09in) ball shaped cutter head
  • large (6-7mm/0.24-0.275in) ball shaped cutter head

v1 hand and v2 donor hand

First warm up the v2 donor hand until it is lukewarm, then pop the hand off its wrist.

Save the donor hand, you can always put it back on a v2 wrist later.
gloved v1 hand with severed wrist
bare v1 hand with severed wrist and v2 wrist

Cut the lugs for the wrist off of the v1 hand as shown in the pictures.

For a gloved hand I use a straight cut, for a bare hand I prefer to make a slightly V-shaped cut so the remains of the lugs wrap around the ball joint of the v2 wrist.
Clean up any sharp edges.

Keep the parts of the v1 wrist as spares.
v1 hand with recess for v2 wrist ball

Use the large ball shaped cutter head to shape a slightly hollow recess in the base of the hand for the v2 ball joint.
v1 hand with wrist joint hole drilled

Drill a 2.5mm diameter hole in the center of the recess in the base of the hand, drill 4mm (0.157in) deep.
I use a piece of masking tape around the drill at 4mm from the tip as a depth gauge.

Note that 2.5mm diameter is actually a bit tight for the v2 wrist pin but this is to make sure the hand fits firmly and will hold any pose.
For this same reason I use a pin vise instead of the motor tool to drill the hole: with a motor tool the hole often ends up slightly wider than the drill size.
v1 hand with hole widened inside

Use the small ball shaped cutter head to widen the inside of the hole.
Create a mushroom shape by twirling the cutter around inside the hole.
Be sure to leave a 1.0mm (0.04in) deep ridge at the open end of the hole at 2.5mm diameter.
v1 hand with v2 wrist inserted

Clean up any burrs and touch up any damaged paint if necessary.
Warm up the hand slightly, then insert the mushroom shaped pin of the v2 wrist into the newly drilled hole in the hand.

That's all !


Cheers,
-- Eric.

Picking a CY Girl, the only time when you can just go for the best looking girl
and get away with it :)