I'm not the first to try this for units, but I thought I would bring it up for units that lost the phalanx formation because they were not mobile enough. A few examples are the Mori Gaesum, Alpine, Ifikratean and other phalanx spearmen. Without phalanx they became less effective, but there do not appear to be many alternatives to retain their mobility and effectiveness.

For hoplite units, I've tried the short_pike and spear before and did not like how it came out for the units and eventually discovered this.

by adding 0.2 the units I tested in large size, no time limit, medium difficulty battles, performed much better then expected so I figured this could be used for these mobile phalanx spearmen who do not have an armor value above 9 or 10.

the unit radius at 0.2 appears to mimic a shieldwall formation without the BI bonuses with tight units like the classical, thorakitai and KH bodyguard hoplites, so I figured it could be applied to the mobile phalanx units that are not as tightly packed in their ranks.

type celtic infantry mori gaesum
dictionary celtic_infantry_mori_gaesum ; Mori Gaesum
category infantry
class spearmen
voice_type General_1
soldier celtic_infantry_morigaesum, 40, 0, 1.22, 0.2
officer ebofficer_celtic_officer
mount_effect elephant -4
attributes sea_faring, hide_improved_forest, hardy
formation 0.8, 1, 1.6, 2, 4, square
stat_health 1, 1
stat_pri 16, 6, no, 0, 0, melee, simple, piercing, spear, 0 ,0.13
stat_pri_attr light_spear
stat_sec 11, 6, no, 0, 0, melee, blade, slashing, sword, 0 ,0.225
stat_sec_attr no
stat_pri_armour 9, 10, 4, metal
stat_sec_armour 0, 0, flesh
stat_heat 5
stat_ground 0, 0, 0, -1
stat_mental 14, disciplined, highly_trained
stat_charge_dist 30
stat_fire_delay 0
stat_food 60, 300
stat_cost 1, 1942, 486, 80, 130, 1942
ownership gauls, scythia, slave


the only obvious drawback that I have seen is that the unit keeps fighting when surrounded longer then expected, which leads me to believe that the smaller radius drains the moral slower so disciplined and highly trained units are turned into tanks, high armor value does not help especially being higher then 9.

Once I figure out how I'll post some screen shots with the units using the 0.2 radius.
Aradan has an EDU guide where he writes that the default is 0.4 but testing with 0.3 did not show as much of a difference as expected. Input is welcome because I know I need to do more testing on this.
Also, here is another thread where using 0.2 radius is discussed.

http://www.twcenter.net/forums/showthread.php?t=188651

depending on what the EB team thinks we could turn this into a mini-mod