There are actually quite a few mods for the HBFP. I've been flying the stock HBFP and different variations of this heli for 14 months. Below are a couple of videos of my modded HBFPs.

Video #1 - http://youtube.com/watch?v=4WJ-mO2IXNY

Setup:

- Slo-Max 300 Main Motor w/10T Pinion
- GWS DD Tail Motor (CN12-RXC)
- GWS Tail Rotor Housing and Vertical Fin
- GWS Tail Rotor Adapter w/4530 Prop
- Super Skids
- Spektrum AR6100 Rx
- E-flite 3-in-1
- Esky 0704A HH Gyro
- Kyosho M24 Blades
- Commonsense RC 2S 800mAh 10C Lipo
- Esky Honey Bee King II Canopy
- Spektrum DX7 Tx



Video #2 - http://youtube.com/watch?v=sv5US_E5Y-0

- Slo-Max 300 Main Motor w/10T Pinion and Heatsink
- GWS Tail Rotor Adapter w/4530 Prop Using Stock Motor Housing
- Super Skids
- Stock E-Sky 4-in-1
- Kyosho M24 Blades
- Commonsense RC 2S 800mAh 10C Lipo
- Stock Tx

Video #3 - http://youtube.com/watch?v=fpRsa00_WkY

Same setup as in Video #2, but with stock tail motor.

If you are just starting out learning to fly helis, I would hold off on the upgrades until you can fly a fully stock HBFP (hovering in all orientations, figure 8s and circuits). You will crash and most of these upgrades will cost you more to crash, as well.