Sizing up overlays clips through armors

[20Whey]

Issue description:
Sizing up over
If crashed, link to crash report (use a site such as pastebin):
no crash
Versions:

• Minecraft: 1.7.10
• Forge: the usual
• CustomNPC+: 1.9.1
  

Can it be reproduced with just CustomNPC+? If not, list the other mods required to reproduce the issue.

[20Whey]

also overlays speed up and slow down over time