Don't understand 
If you enable CRT on server. Checkruntime=2 then server pass clients only with the same mods like installed on server. right?
I have found mod wich allows to have necessary and unnecessary mods. For example:
needed to enter server mod list:
01_Zuti_MDS_v1.13_UP
KK_ZloyPetrushkO_NoInfo_v1_2
KK_ZloyPetrushkO_AAAmod_fast
KK_ZloyPetrushkO_AAATankmod
KK_ZloyPetrushkO_Atm2_modv4_3_s_Rm
not needed, but available to enter mods:
KK_Arms
KK_Avala Terrain lighting
KK_Avala_Planeshine2
KK_CY6_Open_Trenches
KK_POV Mods SASCirX Complete
KK_bombfix_v2.1
KK_FW190 Cowling Mod
KK_JCats_Me109
KK_K&K_Silk_Chute_PL-1
KK_moon_mod
KK_PILOTS
KK_TEXTURES_Ground_Units
KK_Water quiet chaotic waves v.3 11 beta
understand now?