With MacDuff to the North West Frontier

This Friday night we are planning a NWF frontier game.  Here's the sit rep and map from Charles S Grant's Scenario book (a must have for any miniature gamer).

The rules I am proposing are Ross Mac's "With MacDuff to the Frontier" which can be found on his blog.  A few notes on troop types.

1. British Infantry carry Breech Loading Rifles (BLRs), in this case Martini-Henrys.  They get the +1 for BLR firepower but the range is the same as the MLRs (16", 8" short) as confirmed with Ross.  They also count as Elite.
2. Better Indian infantry (Ghurkas, Piffers etc.) count as British, other Indian infantry aren't as well trained so lose the +1 for firepower and Elite status.  These guys carry Snider BLRs.  
3. Afghan or other Native Regulars carry BLRs but aren't as well trained so don't count the +1.  They might count as militia or regulars depending on the scenario.  They also carry Sniders or equivalents (often surplus British army ones).
4. Pathan or Afghan tribesmen count as irregulars, and carry as mix of weaponry counting as Jezails on average.  They make guns over open fire pits, so get the -1 for inferior equipment.  An evil GM might rank a unit or two as Elite or fanatics, but most are just interested in loot.
5. Imperial Cavalry are regulars and carry carbines (count as MLRs as firepower drill was not great).  Many count as Veteran and lancers obviously carry long pokey things.
6. Mountain guns count as light guns, travel as pack and take a full turn to unpack and set up and prep for fire.
7. Other Imperial artillery counts as rifled (or in some cases smooth bores where forced to improvise older weaponry).  
8. Afghan regular artillery use BLRs (Krupp and Armstrongs that were better than anything the Brits used) or smooth bores.  They get the inferior equipment -1 modifying to shoot.
9. Tribesmen with artillery have smooth bores and get the -1 for inferior equipment.

But it's thin red line of 'eroes when the drums begin to roll....