suspension coil gap

[agilecanon]

hey all, as title says really, trying to get spring asisters but do not know the space between the coils on the rear suspension,(centre coils and unsprung) does anyone know?,odd question i know, ,,k11 1.3 98 reg, help as always is much apreciated,cheers

 

[agilecanon]

update,it's approx 35mm incase anyone else whants to know, assisters are in now and so far so good,will check tomorrow to see there not coming loose