jasonudall in my case you would be lucky to get it running at all . on my boards one end of the 2k2 resistor has no track going to it . only be linking this to Vcc can I make the circuit work

jasonudall to change the growing tool...use the Allen key( hex wrench) the L shaped tool..it fits into a grub screw near the end of the tool loosen it carefully since getting it back in can be fiddly . loosen and then remove the grove tool. fit the tool required and tighten the grub screw the grove tool is square in section so note which way round it goes...