Practice helped me a ton.

I got 5 oz of synth to 98 in one hour with hand warmer heat pad you can get at a ski store or hard ware store.

My synth bladder bag was attached to a rubber waist band. I put the bladder up against my skin, with 1 hand warmer between the bladder and the waist band. I kept checking temp every 15 min so I would know how fast it was increasing to judge my time to donor site.

I passed my synth off at 98 within 1 hour of putting the kit together on my body.

I am still waiting on results of the test, but it passed the temp and color test.

The kit i used is "clean stream" as I couldn't find qf 5.7 locally. I am still waiting for anyone to reply if they have ever used the same synth. Still keeping my fingers crossed, but the temp was the easiest part.

Hope that helps.