Stackable screw terminal?

I currently have a reprap duet board with standard pin headers like found on most Arduino boards. To connect wires I've been using stack-able headers (eg 12 Pin .100" Arduino Stackable Header Technical Data). While this works OK, i would much prefer something i can remove the wires from easier and the grip on the pins isn't always good.
I've been looking for a while for screw terminals with the stackable header end on one end instead of pins. I'm not sure they even exist so am wondering if anyone can enlighten me and if they do exist where i can buy them.

My other question is how hard is it to remove the pins from the board to replace with screw terminals, i only have a normal soldering iron, so don't know how i'd simultaneously melt all the solder of a header to remove it.

Thanks for your time,
Olly

Something like this?
If not, I don't understand what you are after.
http://wwww.crossroadsfencing.com/BobuinoRev17/


In case it's NOT obvious to you, the screw shield does NOT require any desoldering.

Thanks for the replies i'll have a look into using this on the duet.

Ok, I looked at the duet board
http://reprap.org/wiki/Duet
It is not Arduino form factor. Looks like they have their own screw terminal board connected by ribbon cable (duex4).
If you wanted to stack those, you'd have to assemble your own ribbon cable, using parts such as:
http://www.king-cart.com/phoenixent/product_name=HWS3985/category=RECEPTACLES-SOCKETS+IDC+.1SP+%2526+2MM+SP/exact_match=exact
http://www.king-cart.com/phoenixent/product_name=HWS1045/category=RECEPTACLES-SOCKETS+IDC+.1SP+%2526+2MM+SP/exact_match=exact
http://www.king-cart.com/phoenixent/product_name=HWS16016/category=WIRE+%2526+CABLE+-+BULK/exact_match=exact

(might have to edit the link to get rid of extra forum-inserted characters at the front)

ollyolly:
My other question is how hard is it to remove the pins from the board to replace with screw terminals, i only have a normal soldering iron, so don't know how i'd simultaneously melt all the solder of a header to remove it.

I find header pins can be unsoldered easily one at a time. When a soldering iron is applied to the solder joint between PCB and pin, the plastic near the base of a pin softens sufficiently to enable the pin to be withdrawn leaving the plastic in place. You need to pull the pin with pliers using a little more force than if you were removing a wire from the PCB. The challenge is holding the PCB steady while holding the soldering iron in one hand and pliers in the other hand.

Screw terminals with 0.1 inch (2.54mm) pitch are not readily available.

Sure they are, just need to know what to look for

Maybe turn it sideways and solder the legs to the existing male pins.
And need a really small screwdriver.

Thanks all for the advice, much appreciated, I've decide to resolder the contacts on the board as i think in the long run it will be better and neater!

Cheers once again
Olly