Development System Changes

Gentlemen, I needed to move to the DA14585 or 6 because I needed more RAM/Flash. My application is written on the
5.03 development system. When I looked at the new 6.02.243 development system I saw that all of the handlers for
the cust1 Bluetooth services are completely rewritten. This means that I will have to completely rewrite/debug my code, a
task which could literally take months of time. Needless to say I am very freaked out by this.

I am hoping there is a way to get the DA14585/6 to work with the old development system so I don't have to change
my code

or barring that -

if I can just use the old handlers e.g. (dws_create_db_req_handler, static int dws_enable_req_handler,
static int gattc_write_cmd_ind_handler ETC....) in the new development system. This is really a huge problem for me.
Can you give me some advice? Craig