Hello@KitSileya, well done on your diligent control,
May i reccomend a book that i have found to be invaluable, Dr Richard Bernstein's Diabetes Solution 4 th ed.
He himself has been at1 for over 50 yrs and has helped so many understand how to control this illness
I myself have used his methods and lchf regime with very good results,my bs Today are now 3.6 am fasting ,5.2 am afeter breakfasr and 6.2 after main meal
In answer to your question, it is advisable to avoid any bs rise over 2.0 mmols ,as Dr Bernstein knows, it's these spikes that cause nerve damage, clive