I started with a standard ET II and upgraded it step by step to a fully modded ET 2.5. All of the changes were worthwhile. The biggest bang for the buck in descending order:
DIY Air Pressure Regulator
2.5 Larger Diameter High Pressure Manifold
Magnesium arm wand
Damper Trough
Bright Star Padded Cell (to silence the air pump
if it has to be in the listening room)
DIY Air Pressure Regulator
2.5 Larger Diameter High Pressure Manifold
Magnesium arm wand
Damper Trough
Bright Star Padded Cell (to silence the air pump
if it has to be in the listening room)