Self propelled artillery
Sorting out north korean self propelled tube artillery is a difficult task. Broadly speaking it seems that north Korean self propelled artillery development has taken such forms.
1)Towed guns of various types mounted on the rear of the standard ATS-59 tractor
Source: Jedsite
2) Assorted guns mounted on an armored chassis based on ATS-59 in open topped mounts without full traverse.
3) Assorted guns (but on the lighter side, such as D-30s and antitank pieces) mounted on a VTT-323 APC derived chassis, in open topped mounts without full traverse.
4) Assorted guns mounted in a fully enclosed, turret equipped SPA.
5)In addition to this some miscellaneous types, such as the 170mm Koksan, the 120mm turret mortar etc.
The last three categories are decently represented as it is. The first two might require some changes. It is not easy as the designations are generally given for year and caliber but often they are not clear about which model of gun is fitted to which chassis. On the basis of Bermudez and other sources I would suggest the following changes.
Unit 281 M1974, unit 283 M1991 and unit 466 M1985 would be deleted
Unit 465 M1975 SPG
1)Icon changed to n. 2346 or a dedicated icon
2)Speed reduced to 13
3)Ammunition could be reduced, say by half or more.
This would be the basic non armored ATS-59 based version. Being apparently an ad hoc installation probably not much space for on board ammo is available.
A clone of the above unit 465 added with the following changes
Name changed to M1974
Rearmed with weapon n. 111 152mm D-20 FH. ROF and ammo load changed as needed
A dedicated icon for the armored version of the ATS-59 based chassis might be worthwhile.
Armament would be in three variants
M1981 with a D-74 122mm gun
M1981 with a 130mm gun
M1985 with a D-20 152mm gun
The closest to a top view I could get.
I would suggest low armor values, maybe 2 for the hull front, 0 on top and 1 elsewhere. Speed could be set to 15. Availability dates could be set at about the nominal year or so. Ammunition load same or slightly higher than the non armored variant, still less than the fully enclosed Chuch'e-Po
Formation 75 SP-Mortar Bty
Number of units increased to 9
A SP-Mortar Pl could be added with three vehicles
A clone of formation 245 Mech Bn Spt could be added with the following changes
1)Mot Mortar Pl in slot 5 replaced by formation n.75 SP-Mortar Bty
2)Wheeled ATGM Pl in slot 6 replaced by formation 60 Tracked ATGM Pl.
3)Availability date 1/1985-12/2020
To account for the availability of VTT-323 based variants.