1008 posts
The extension would/should have enough going into the mast when set to full extension. I would think that the shorter the extension the better but my 7.8 says 430mast and a 30cm extension and so far so good
1312 posts
The Chinook tall is fine for both proposals.
Discussion on extensions , that using the full length could result with a broken/ bent item.
valid concern, but done all the time , and the EXT is made to do just this.
