Much better idea for my older dogs (11 &13). Interestingly it is the 16mth old pup who is reluctant to use it!
Strength of magnet at bottom an issue at moment, suggest future option should be multiple strip's that can be easily removed and replaced as needed.
Also original perspex flap was a problem to remove, one nut and bolt would not undoubtedly- sorted with an angle grinder! Soft flap installed with 2 fixings only now.