Describe the bug
A new model is created every frame to render while the Jetpack is worn instead of reusing an existing one.

To Reproduce
Steps to reproduce the behavior:
Step 1: Equip jetpack
Step 2: watch as 100s of jetpack models are created every second

Expected behavior
Reusing an existing model

Screenshots / Scripts / Logs
Here is the problem code:
https://github.com/BlakeBr0/IronJetpacks/blob/1.16/src/main/java/com/blakebr0/ironjetpacks/item/JetpackItem.java#L196

Versions (please complete the following information):

• Minecraft: 1.16.2
• Forge: 33.0.20
• Cucumber: 4.1.1
• Iron Jetpacks: 4.1.0