Here is another easy way to improve toe touch and reduce perception of stretch and tightness in the LQ posterior chain.
Isometric Flexion Pattern to Improve Toe Touch
Why does this work? My thoughts are activating the flexion pattern without the "bad feeling" in your hamstrings/calves. Do this enough and the association of that perception with that movement pattern is now disassociated.
If there is still some discomfort with the active straight leg raise, you can add an EDGE Mobility Band to further decrease stretch perception. Make sure with the ASLR that you do not perform it too slowly as this tends to fatigue the hip flexors prior to completing the pattern.
Interested in live cases where I apply this approach and integrate it with pain science, manual therapy, repeated motions, IASTM, with emphasis on patient education? Check out Modern Manual Therapy!
Keeping it Eclectic...