Hi all, hi benpaddlejones, got another quesiton

I have set up my own wii IWB and I've used both Boon Jin's smoothboard and Johnny's wiimote whiteboard V3, I have found that Boon Jin's software seems to have a much better resolution than Johnny's, when I draw a diagonal line slowly in Boon Jin's software, the line is nearly straight with only minor aliasing; but when I draw the same diagonal line in Johnny's software, there are large steps all along the line, the steps are as high as 1.5-2cm on my 84" screen. And it is much harder to write in Johnny's software than Boon Jin's.
However, when I write in Boon Jin's smoothboard, the line breaks very often, by contrast, the line never breaks when I write in Johnny's software.
So I'm curious to know, it is the same pen and same screen I have used, why the line breaks in Boon Jin's software but not in Johnny's? maybe it is because the 2 softwares have totally different algorithm on calculating the center of the touch point? and why Boon Jin's software gives a much higher resolution than Johnny's?
Another interesting thing I have found out is, when I write on the screen with the butt of the pen, with the LED facing exactly the wiimote camera, I get very good resolution in both Boon Jin's and Johnny's software.
If anyone could help me understand this, I may be able to develop a pen that exerts full potential of wiimote and the software, then share my idea and contribute to the wiimote IWB community
