OK, the longer answer was... unfortunately not if I want it to not be a right old faff and be able to re-use as much of the box as possible
Anyhow, good luck with the injector washer swap, some tips:
* grind down the inner side of the short end of a long 6 mm allen key and use that to gently rock the injectors out of their seats (insert it under the bridge of the injector).
* wrap some electrical tape around the injector body to stop the o-rings dropping into the 'valleys' as you fit them. (don't forget to remove it before refitting lol )
* use a small diameter (whichever fits closest to the injector core) deep socket to gently tap the new washers onto the injectors - don't push them on because the washers will distort. There are a couple of types of washer (the genuine ones are the snuggest fit!) and depending on the injector type they will either be a really tight fit or really loose - blob some grease onto the washer if it's loose so it doesn't drop back down the bore when refitting.
* DO NOT force the injectors back into their bores when refitting them, just gently lower them in, then fit the injector clamps. Gradually tighten down the clamps alternating between the bolts, this will drive the injector back into the seat square and should minimise the risk of the injector seats getting cracked.
Hope that helps!