Walls Are Solid - Combat Extended already patches many buildings to take less damage from bullets, so it's recommended to adjust the multipliers in the settings.
"WalkerGear.Building_EjectorBay" => Exosuit.Building_EjectorBay,
"WalkerGear.JobDriver_GetInEjector" => Exosuit.JobDriver_GetInEjector,
"WalkerGear.WalkerGear_Core" => Exosuit.Exosuit_Core,
"WalkerGear.PawnRenderNodeWorker_WeaponOnGantry" => Exosuit.PawnRenderNodeWorker_WeaponOnGantry,
"WalkerGear.CompProperties_BuildingExtraRenderer" => Exosuit.CompProperties_BuildingExtraRenderer,
"WalkerGear.CompApparelForcedWeapon" => Exosuit.CompApparelForcedWeapon,
"WalkerGear.CompProperties_WalkerComponent" => Exosuit.CompProperties_ExosuitModule,
"WalkerGear.CompProperties_ForceUseWeapon" => Exosuit.CompProperties_ForceUseWeapon,
"WalkerGear.CompProperties_LaunchExhaust" => Exosuit.CompProperties_LaunchExhaust,
"WalkerGear.CompProperties_ProjectileFleckEmitter" => Exosuit.CompProperties_ProjectileFleckEmitter,
"WalkerGear.CompProperties_MeleeSweep" => Exosuit.CompProperties_MeleeSweep,
"WalkerGear.Projectile_Parabola" => Exosuit.Projectile_Parabola,
"WalkerGear.ModExtForceApparelGen" => Exosuit.ModExtForceApparelGen,
"WalkerGear.ModExtension_NoIdeoApparel" => Exosuit.ModExtension_NoIdeoApparel,
"WalkerGear.ModExtWalkerCore" => Exosuit.ExosuitExt,
"WalkerGear.ApparelRenderOffsets" => Exosuit.ApparelRenderOffsets,
"WG_WalkerGearLayer_Core" => ExosuitLayer_Core,
"WG_WalkerGearLayer_Utility" => ExosuitLayer_Utility,
"WG_WalkerGearLayer" => ExosuitLayer_Attach


Two questions on this:
1) What would need to be adjusted here to restore the original idea of “Walls are solid” with regard to the resilience of the walls?
2) Would it be possible to patch “Walls are solid” so that it works with the current version of “Combat Extended” without error messages?