ok no problem

it is UserForm2

comboboxes
piston1 to piston6 the code is the same except it references to the different comboboxes

piston1 - units1 - applied1 - corrected1 - reading1 - error1
are all crossed reference to one another, hope this makes sense

thought i could create a loop to go through the procedure for each change to the comboboxes piston1 to 6

as you can see its a lot of typing

hope this helps
thanks