How hard is it...?

[GTRS Fiero]

How hard is it to replace the mode actuators?

[Donster]

For me, the first difficulty would be to identify what they are, then where they are. 

[GTRS Fiero]

Mode actuators control the air flow for the HVAC system.  They are at the HVAC ducting.

[Fierofool]

It would probably be easiest to remove the complete dash.  Don Hulse told me they aren't that easy to change, but I don't know how he was doing it.  Even with the dash removed, there's still a good bit of the ductwork still attached to the front bulkhead.

[Raydar]

I'm told that they can be partially accessed, by removing the part of the heater/aircond housing that is in the front compartment.
Haven't actually tried it, however.
I think Roger had a "go-round" with his.

[GTRS Fiero]

Hopefully, Roger will reply.

It looks difficult.  This is not something to which I look forward.