WHL - Can Fort William match Oban train frequency?

[haggishunter]

In short can the frequency of the service to/from Fort William be increased to match the doubling from 3 to 6 Glasgow ScotRail services that Oban now has with the current infrastructure?

Would an increased frequency North of Crianlarich need to run at different times to the Oban only services in order to fit through the existing passing loops and would that mean they couldn't be pathed through South of Crianlarich?

Could additional services thus be created in the shorter term by adding Fort William to Crianlarich services that allow interchange with the additional Oban services?

 

[30907]

The most useful working would be a FTW portion off the 1033 from Queen St and returning early afternoon. This would work reasonably well on Saturdays with the 1611 ex Oban. The SX equivalent is more difficult - in one direction or the other the train would have to run independently from GLQ. 0920ish out and 1410 back would work, and probably use a unit in marginal time, or 1033 out and 1510 back.
Crewing would be OK if Glasgow crews sign FTW!

The only other working worth considering would be at 1840 from Crianlarich, but I can't see any useful stock balance for this.