Celcius CTW Owners, especially the M4A1 MX3, can follow this video made by eHobby Asia to program their CTW to fire 3-round bursts. The method is like the usual MOSFET programming, with an LED light indicator as compared to the basic MOSFETs. For those looking for an alternative to the PTW, you might want to check this at eHobby Asia.

CELCIUS Training Weapon CTW M4A1 MX3 (Civilian Version)

• CNC processed Steel Outer Barrel With 45mm Steel Flashider (Clockwise 14mm)
• CTW Planetary Gearbox
• Metal Carry Handle With Adjustable Rear Sight
• 6.00mm Reformation Barrel II -- Stainless Steel
• MX-3 DP-System™ MOSFET board with Silver-Plated conductors
• Typhoon II Motor
• Celcius Dynamic ECU™ - Full Auto & Burst
• 120 Rounds Loading Capacity High Speed Magazine (Steel Case)