Gents,
I modded a joystick just like the one I own... Found one on ebay for 9.99 so I bought it to mod. I extended the shaft around 7 inches I guess...I'll have to measure it... Here are pics of the unmodded and modded stick. It's taking me a while to get used to the new configuration. I apologize for not taking pictures as I modded the stick....I just got in a groove and completed it start to finish.
I used 2 different sizes of copper tubing with pvc connections to join the pieces. I extended the cables for switches etc with a small gauge wire....was pretty straight forward. Bought one of those "Cold Heat" soldering irons....they actually work! I'll try to take some video of the stick in use to give you an idea on how it feels... Here's the pics
Unmodded Stick Head On

Unmodded Stick from the Side

Unmodded stick as I was using it in the cockpit

Another Angle

Here's the unpainted modded stick

Another Angle

Painted stick post mod.

Modded stick as it is in the cockpit

Another angle of it in the cockpit

Stick as it would be in use... my legs are usually further apart...for more travel...posed for the pic..

Another shot of the same

Last pic is to show the texture of the paint I used. Not just flat silver... Ignore the jagged plastic at the bottom of the grip...it's hidden from view when in use

Had to cut the grip...

Regards,
TX-Rahman
"WHITE 6"