we just got my buddies i10k up in the scorching sun, it replaced a sirio 827 which is the best 5/8wave available in the uk, it is mounted on the same pole position and height about 34 feet to feedpoint as the 827 for a fair test, after a few adjustments to the trombone i got a flat vswr on our band centre, initial tests show the i10k is slightly more than 1/2 s unit better on my meter ( 3db per unit ) at 2 miles and 1 s unit on a uniden s meter at about 10 miles, are we pleased? you bet we are