Newbie Help. How to extend this box I made.

[Anonymous]

Hello all.

I have this box I made https://grabcad.com/library/no-2#   (also attached)

Here is a screenshot of a measurement I made: 

All I need to do is make the box wider, so that the measurement between those 2 points is 49 instead of 42.

I don't mean stretch everything, but simply extend the the middle parts of the box on the left and right side of the circular funnel thing by 3.5mm

How would I go about doing this? Honestly, if someone could even just do it for me and upload it, I would be very appreciative. If not, I'll try my best to figure it out.

[Anonymous]

This is perfect!!!

I appreciate that so much!!!! Thanks a million