Be aware that many Slide Copying attachments where made for Full Frame 35 mm Film Cameras. These will produce a cropped image on an APSC Digital Camera.

Some of the cheap, so called Film Scanners, are in fact cheap Digital Cameras. A version I bought from Aldi produces terrible copies.

Quite a few Flatbed Scanners have Film Scanning hoods built into them. I have had Epson Flatbed Scanners that have done a good scanning, on sldes and negatives.

London Camera Exchange have a number of shops around the country. They do Pentax and have a great range of secondhand items.

WEX is an online retailer with a good stock list.

What is Adobe 6 ?
Photoshop 6
Photoshop Elements 6
Photoshop CS6
Adobe Camera Raw 6

It would help if we knew which one.

The old Ohnar Slide Copiers were made for full frame film cameras. On an APSC digital camera, they crop the image.

I do not know whether their are now newer versions, which allow for the smaller crop image.

We start modifying what's there as soon as we press the shutter to take the photograph. Sensors, raw or jpeg, lenses, angles of view, depth of field, saturation, sharpness, contrast, filters and composition all change reallity. The in-camera jpeg engine does a lot of processing automatically.

It used to be said that slides used to be pure photography. Even with slides we could choose different makes and types to distort the truth. Underexposing also increased the colour saturation. .

To answer the OPs question to clone or not:-

My stance on this is it depends on what the end purpose of the photo is.
If it is meant to be a true record, then don't do much to it.
If it is Natural History, then keep it pure.
If it is open pictorial, then there are no rules other than the picture is derived from photographic images with the copyright held by the author.

Have a look at an Open Exhibition of photos. These represent the cream of amateur photography. In the open sections, many of the acceptances will be photoshop manipulated.

I mainly produce pictures, not records.

This is the only thing that I don't like on the K5. Others have suggested that a piece of tape is stuck over the top of the card to act as a flexible extension. This does in fact work. I have also now settled on the fast flick.

I watched most of this programme last night.

Combining Street Photography and Fashion Photography with the use of a telephoto lens. He certainly was an original. Great images.
The past and current conversations with the man and his models, was also very interesting.

Formal photos in connection with a sports shop could be:-
Outdoor photos of the front of the shop.
Outdoor photos of the front of the shop with individual sportsmen or teams positioned in front.
Outdoor photos of the front of the shop, with individual or groups of staff, positioned in front.
Inside the shop photos of sportsmen or staff or customers.
For many of these situations, the 16-45 lens that you have is a good staring point. If you require a wider view, to get more in, then invest in a 12-24 or 10-20 lens.
Of course, if the sports shop require action photos of various sports, then you may need a lens in the 150-500 range. The Pentax 55-300 is a good starting point.
Your Pentax K5 has an Auto ISO feature that can be selected. This feature automatically adjusts the ISO sensitivity for different levels of light. Indoors light can be very low and ISO 800, 1600 and 3200 can still give good results. Don't forget that the Pentax K5 is one of the best performing APSC DSLRs in low light; if not the best.

In my opinion the Pentax K5 is almost perfect. My sugestions for improvement would be:-
Faster autofocus, but still retaining accuracy.
Better positioning of the card door, to enable easier ejection.
The addition of a robust flip-out viewing screen.
More megapixels, if it does not increase noise.
Better High ISO Performance, if that's possible.
A more robust lens changing button.

Pentax have got the best position for the lens change button; under the right hand. Pentax must stick to this. This to me, is a major feature for good handling. Canon and Nikon have lens change buttons on the left hand, which ruins the handling, when changing lenses.

They look good. Wonderful performance at ISO 12800.

Did you use and noise reduction software?