Yep, although I was thinking about your chest training Stu.

Do you still do your bench pressing at home with a barbell?

The alternative would be to do all your chest training with dumbells at the gym so you can get the benefit of not resting.

Pec dec is not what I would call a major exercise for the chest and as such I might question its validaty just on its own.

If there is a bench at the gym and a good selection of dumbbells then you can do the following:

Flat dumbbell press
Incline dumbbell press (30degrees)
Dumbbell flyes
Pecdec

Or if you have dumbbells at home, forget about the pecdec and just train arms at the gym. THen you can do

Bench press (flat, incline, or even decline)
Dumbell press (flat, incline, or even decline)
Dumbbell flyes

All at home. This way your chest gets a good battering in one go.