Of course if you are going out for the day specifically to only use your long lens then you can simply install the Mongoose, and conversely if you are out for the day and you are not carrying the long lens then leave the Mongoose home. Fortunately or unfortunately I rarely go out for "purpose" photography.
I have the Manfrotto 055CXPRO3 - love it; tall enough that I do not have to stoop at all; and the center column can be rotated to a horizontal plane for macro.
I also have the Manfrotto 488RC2 - weight: .67kg = 23.6oz.
Artie has indicated:
14 oz Giotto's ballhead; a savings of 10 oz.
The Mongoose 3.5 = 1.5lb/24 oz; the Sidekick weighs 19oz. They both need some type of a plate.
Mongoose requires the CP-42 (1.6oz); the Sidekick is a problem with the 488RC2.
Is anyone using the Sidekick/488RC2 combination?
On a website discussing Sidekick compatibility with various ball heads -
http://www.tripodhead.com/products/s...patibility.cfm - it appears that the Sidekick is not/may not be compatible for the 488RC2. I have sent an email to tripodhead.com inquiring about the 488RC compatibility issue and what can be done to make then compatible without a lot of mechanical machinations.
Cheers,