Swingweight/length on drivers

[stianvm]

Edit : (Ugh. Was in the wrong section when posting this thread. Should ofcourse be in the "Golf Equipment" subforum)

How much does swingweight matter when you replace your driver ?

I have played with the R7 for a year now until the shaft caved in the other day. Reshafting would set me back around 200$ here(expensive!!), so i figured out i'd give newer clubs with fancier technologies a go.

R7 460 9.5 REAX 55 regular , 45 inches- Feels light although a total weight for 330ish grams(added a 16g of additonal MWT weights which should change the default D0 swingweight somewhat) This is the one that broke .

R9 460 9.5 Aldila REAX 60, 45.75 inches, D4 - Feels heavier with a total weight of just over 300 grams

TM Tour Burner 10.5 Fujikura REAX Superfast 60 regular, 45.5 inches, D5 - Feels heavier with a total weight of just below 300 grams

During 2 test sessions i've had i cannot get a proper swing on the R9 and the Tour Burner at all, leaving ugly shots to .

The R9 and Tour burner simply feels heavier, but is this because of the difference in swingweight or shaft length ? I wouldnt mind slices/hooks during testing, but the amount of ugly mishits leaves me wondering whats causing so severe results. Could a swing be so honed that such small changes can mess up so much ?

Edit #2 : When writing i forgot all about kickpoints in shafts. Could a small change in kickpoint make the necessary difference in impact (or lack of proper impact) ?

If i dont get around this ill just fix the R7 ( i really should because the clubs kicks serious arse)