I agree, they've been using them for a long time and the tools are now readily available. Chances are if you need to get a Philips screwdriver small enough for the job, you can get a Pentalobe screwdriver from the same place.

You also don't need the iSclack, you can just use a regular suction cup; the iSclack was created to help you open the 5s without breaking the tripwire known as the TouchID cable.