Kentmere 100 in xtol 1:1 times?

Hi, I've got a batch of students films to process kentmere 100, we only have xtol available at the moment, and there's no times on the dev chart :/ also I've seen times for kentmere 400 ranging from 9.5 mins to 12 min 1:1 at 20c so that hasn't helped me guestimate!!!
does anyone have experience of times at all? I know it's a huge shortcut and I should test but limited time and materials !!!

http://www.kentmere.co.uk/products/product.asp?n=67&

I don't think you'll find developing times for Xtol in their fact sheet, but there are times for D76 1+1, which you could extrapolate from.

D76 1+1 says 11.5 minutes at EI 100.

If you at the same time look at FP4+, a similar film, you see D76 1+1 times at 11 minutes at EI 125, and Xtol 1+1 times of 10 minutes at EI 125.

It would probably be safe to develop them for 10 minutes using Xtol 1+1.

If you really wanted to check it out, shoot a roll for yourself first and see what you think. Adjust as appropriate.

As much as this is worth: I've done Kentmere 100 at EI 100 in Xtol 1+1 for 12 minutes, with gentle agitation 5 seconds every whole minute. With my setup I got easily printed negatives that prints well on grade 2 or 3, depending on what contrast I would want for a given image.

I'd suggest a test using a dozen "correctly metered and rated" exposures (ie. not a random student film), which should contain some shadow and some highlight areas, cut off from the cassette in camera then develop a short section at your choice of likely time another at -20% and another at +20%. If you have a deep tank system this time variation will be very easy to arrange, but even with a hand-tank it will only take forty minutes or so to get something where you can compare the negatives - you don't even need to dry them.