Hi MSRStewart,
I am sorry to read that there's been an installation that has left you a little uneasy about this, the tools and equipment they wold have should be enough and would not need any of your own equipment.
I would like to ask if you've been able to give us a call on 150/ 0345 454 1111 and speak to one of the team to discuss this?
I would love to help and if not already done so, I would like to help.
Take care and thank you for coming back to the Community again.
Ben