I dont know wheather this is the right place to post this work, I was very much impressed by the stock on the Briha ji air rifle "samurai"
I tried to do a customizing work on my IHP Air rifle stock, Before that as a trial I tried it on a ISW Stock.
First I tried to thin the grip area and added a adjustable cheek piece on the stock. Pics are added Below.
Now the main part: Checkering comes into play.
I searched a lot of shop for getting a checkering tool, but all my efforts were in vain. So decided to do a checkering pattern by myself.
My plan was a childish plan to do this job but at last gave me some results.
I used two Flat Screw Drivers (A very thin one and A bit Bigger one) ,to make the lines and then used a small hacksaw Blade to clear the spacing between the lines.
And the Pics are added below. Please share your views on my work.
Stock Work:
Checkering:
It is a pretty tough technique to master and require specialized tools to do the job...The lines have come out pretty nicely..eagerly waiting for the final result (post polishing/finishing etc). All the best & keep up the good work 
