Dear Gruman,
Yes, the extensions will be there then.
The weight is a problem ,we still work hard to reduce the package weight.
You can buy from our Euro/US store(1.5 more month for ship transport), or send from China by air.
About the desk mounts, we have simulation when design them, when 100lbs force from top and 50lbs force from side work together on it, less than 2mm move on top of grip. It's as strone as your bike structure, you only need to worry your desk board!
Thank you very much.