VBA to Insert row & data from user form in list

I'm trying to take on a project to help one of drilling guys to simplify inputting his casing tally's on the rig. He's completely Excel handicapped and I know just enough to be dangerous. I know it's fairly simple I just can't seem to put all the parts of code together and get it to work nor do I know what to fix when it doesn't. What happens is that as the pipe is received it's measured among other things and those measurements or Tally is kept in a spreadsheet similar to that attached. I created a VERY basic mock tally to test any script I could find. Once the pipe is ready to put in the well certain attachments may be added within the string that is numbered in the left column. Also some pipe may be kicked out (has X in right column) for one reason or another so it's length is not counted in the tally. What I would like to happen is that when you want to add a casing attachment you click the radio button and it brings up the user form I built. On the form the first box should contain a drop down list of the attachments (float collar, float shoe. etc). Then the form asks for it's length. Then finally where do you want to put it between joint # x & y found in column A. When you hit insert attachment it should create a row between joints X & Y in column A that you designated. Put the name of the attachment in col A of the newly created row, then put the length in Col B of the new row. It would be nice if it automatically recalculated the depths with the new attachment and kicking out any with an X, but if I need to add another "Recalculate" radio button to do this it's not a problem.