Ah! Now I got it! Thanks alot Brimc76 and Grey Wolf! I really appreciate the instructions! I didn't even see that rubber seal till you mentioned it. lol
Thanks again guys!!

And Robert...the bearer of bad news! lol I 'thought' that 2521 looked real short in length to fit the motor base. The 2551 is way too big for me, I rarely need to dev. that many sheets and waste alot of chemistry. Although maybe, one could use only one reel and enough chemistry for one reel in the 2551?? You know by chance Robert if that'd work??

And Aggie also sugg. a Nikor tank...but that also looks to small to fit the base. Well...I think I'll still get the 2521 and hand rotate develop with it, and seal up these Unicolor drums as noted above and stick to these on the motor base.

Boy..never thought this would all be so difficult getting a system put together lol

Thanks alot for all the help everyone!!