Hi Rob, No mate, you don't remove the bottom blade from its holder....You send both the cylinder reel and the bedknife holder complete to the guy that's going to sharpen them. If the bottom blade needs replacing or removal, he has the correct gear to do it and has new screws to replace the old ones....
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member. Kindest Regards, Darryl