Hand Made Guns Overdrive

Changelog

• Fixed HMG OBJ/VBO rendering so gun and attachment models now properly preserve caller-owned OpenGL client state instead of resetting buffer bindings and vertex-array state after rendering.
• Fixed BackTools integration so HMG back-weapon rendering only runs for the actual remembered weapon on the actual player being rendered.
• Prevented NEI, inventories, and other generic item renders from incorrectly entering the BackTools compatibility path.
• Fixed weapon-switch behavior so the previous gun can still appear on the player’s back without duplicating the currently held weapon.
• Prevented BackTools’ legacy renderer from double-rendering after a successful HMG custom render while retaining it as a fallback.
• Improved compatibility with Angelica/Celeritas and other renderers that depend on strict OpenGL/Tessellator state ownership.
• Confirmed HMG-heavy NEI pages now render correctly without triggering the previous crash path.
• Identified the remaining NEI crash trigger as the old Flan’s Mod Ultimate 1.1 workbench rendering; switching to FMU Stability Edition 1.6.0 resolves it.