The Rampage board for the BT is a direct Drop-In replacement for your existing E-Grip. 
This board features:

State-of-the-art RISC Microcontroller
Weather Resistant Conformal Coating protects your electronics in the Rain! 
Extended Battery Life 
Simple Push Button Selection to Change Firing Modes
Visual LED Mode Indicator – Visible in Direct Sunlight!
8 Base Firing Modes:

• Semi Automatic
• Burst
• Reactive 
• TRUE Full Automatic
• Turbo+
• Rampage™
• PSP3
• NXL

User Programmable Firing Mode Enabler – You decide what modes are enabled or disabled
Rate of Fire from 5 to 30bps!
Adjustable Dwell and Debounce
Programmable Burst Mode
Programmable Rampage Mode
Programmable Turbo+ Mode