Just a short remark, but maybe helpfull as not documented (please point out where it can be found if i am wrong): Usually, all HFs, but especially custom ported or compiled ones, have to be re-compiled for new Jumbo HFA Takes. But certain HFs do not fall into that category (the reason is that they address a very special part of the CP installation, e.g. a single file) and can be installed over even the newest Jumbo Take.
The following three HFs have been created to be installed on top of R77.30 Jumbo HF 266, but still also can be installed over newest Take 309:
Check Point R77.30 Hotfix for sk118539 (Kaspersky Anti-Virus Removal) - Take 10 (Check_Point_R77_30_KAV_Removal_Hotfix_sk118539_T10_FULL.tgz)
Check Point R77.30 Hotfix for sk111292 Missing Appliance type in SmartConsole Platform Hardware Type list
R77.30 Mobile Access Blade Deployment Agent (MABDA) for Chrome and Firefox
They have just to be uninstalled before installing the new Jumbo Take and then re-installed afterwards.