I am trying to add a simple accelerando to my piece and am extremely frustrated with how complicated this seems be. The section is in 4/4 and is nine bars long and starts at quarter = 90. I need the section to accelerate so when it hits the first bar of the next section (would be the 10th measure) the tempo is quarter = 200. Any help you be greatly appreciated. I'm just not getting the Expression Designer/Shape Designer method. (Please do not refer me to help sections, I've spent hours there already!) 

Thanks in advance.

Finale team: if there isn't one already, the product really needs some sort of simple accelerando tool.